Women of childbearing potential (?12 months of non-therapy-induced amenorrhea or surgically sterile) must have had a negative serum pregnancy test within the past 21 days and must use a birth control method in addition to barrier methods (condoms). Men and non-pregnant, non-breast-feeding women may be enrolled if they are willing to use 2 methods of birth control or are considered highly unlikely to conceive; highly unlikely to conceive is defined as 1) surgically sterilized, or 2) postmenopausal (a woman who is >= 45 years of age and has not had menses for greater than 2 years will be considered postmenopausal), or 3) not heterosexually active for the duration of the study; the two birth control methods can be barrier method or a barrier method plus a hormonal method to prevent pregnancy; patients should start using birth control from study visit 1 throughout the study period up to 120 days after the last dose of study therapy; the following are considered adequate barrier methods of contraception: diaphragm, condom (by the partner), copper intrauterine device, sponge, or spermicide; appropriate hormonal contraceptives will include any registered and marketed contraceptive agent that contains an estrogen and/or a progestational agent (including oral, subcutaneous, intrauterine, or intramuscular agents) Men who are sterile OR agree to use at least two forms of a reliable and highly effective method of birth control and to not donate sperm and for at least 180 days following last dose of TRC105 or sorafenib. Sexually active male or female must be surgically sterile post-menopausal, or must agree to use a physician-approved method of birth control during the study through a minimum of 120 days after the last study drug administration. Female patients with negative pregnancy test at Screening and use of acceptable method of birth control for study duration, unless surgically sterile or postmenopausal for at least 1 year prior to Screening. Female patients who are not surgically sterile or postmenopausal (for at least 1 year) must practice at least one of the following methods of birth control throughout the duration of study participation and for at least 3 months after study treatment: Non-vasectomized male patients must comply with at least one of the following methods of birth control throughout the duration of study participation and for at least 3 months after study treatment: Sexually active women, unless surgically sterile (at least 6 months prior to study drug administration) or postmenopausal for at least 12 consecutive months, must use an effective method of avoiding pregnancy (including oral, transdermal, or implanted contraceptives [any hormonal method in conjunction with a secondary method], intrauterine device, female condom with spermicide, diaphragm with spermicide, absolute sexual abstinence, use of condom with spermicide by sexual partner or sterile [at least 6 months prior to study drug administration] sexual partner) for at least 4 weeks prior to study drug administration, during study and up to 30 days or till next chemotherapy cycle; cessation of birth control after this point should be discussed with a responsible physician; investigator will discuss with patient on the above points and the patient agreement will be documented in the source document; the investigator should ensure that the patient is using an effective method of avoiding pregnancy as per protocol; in case of male patients: either patient partners or patients themselves must use an effective method of avoiding pregnancy for at least 4 weeks prior to study drug administration, during study and up to 30 days or till next chemotherapy cycle Female subjects must be surgically sterile, or have a monogamous partner who is surgically sterile, or at least 2 years postmenopausal, or who commits to use an acceptable form of birth control (defined as the use of an intrauterine device, a barrier method with spermicide, condoms, any form of hormonal contraceptives, or abstinence) for the duration of the study and for 3 months following the last dose of study treatment. Male subjects must be sterile (biologically or surgically) or commit to the use of a reliable method of birth control (condoms with spermicide) for the duration of the study. If a female patient, must be surgically sterile, post-menopausal, or must agree to use physician-approved method of birth control during the study and for a minimum of 30 days after the last study drug administration, or if a male patient with a female partner, must agree to use physician-approved method of birth control during the study and for a minimum of 30 days after the last study drug administration Female subjects must not be pregnant; willing to use 2 methods of birth control/abstinence if applicable through 120 days after the last dose of study drug Patient is a female of childbearing potential (FCBP)* with a negative serum or urine pregnancy test prior to initiation of therapy and agrees to practice appropriate methods of birth control, or the patient is male and agrees to practice appropriate methods of birth control Currently pregnant, nursing, or planning to become pregnant during the study or within 1 month after study drug administration. Female subjects must be surgically sterile, at least 2 years menopausal, or using an acceptable method of birth control. If of childbearing potential, the subject must have a documented negative pregnancy test within 24 hours before surgery. Male patients must be surgically sterile or using an acceptable method of contraception (defined as barrier methods in conjunction with spermicides) for the duration of the study (from the time they sign consent) and for 20 weeks after the last dose of study treatments Women of childbearing capacity are required to have a negative serum pregnancy test before treatment and must agree to maintain highly effective contraception by practicing abstinence or by using at least two methods of birth control from the date of consent through the end of the study; if abstinence is not practiced, one of the two methods of birth control should be an oral contraceptive (e.g., oral contraceptive and a spermicide) Women of childbearing potential must have a negative pregnancy test at study entry; all sexually active patients will be educated regarding the teratogenic potential of the chemotherapy they receive, as well as the infectious risks of intercourse; contraceptive methods will be discussed and sexually active patients must agree to use an effective birth control method for the duration of the study; a medically acceptable method of contraception appropriate to the patient’s underlying disease, risk factors and lifestyle will be offered in consultation with gynecology or adolescent medicine and will commence on study entry; in general, most postmenarchal female patients may qualify to receive depot medroxyprogesterone acetate (DMPA) 150 mg intramuscularly (IM) or 104 mg/0.65 mL for subcutaneous (SC) injection; injection needs to be repeated every 3 months while on study; prior to IM injection, ensure that platelet count is > 30,000 x 10^9/L; patients ineligible or refusing injectable contraceptives will be offered other medically acceptable contraceptives if appropriate, such as oral contraceptives or birth control patch, or barrier methods if male (and whether or not surgically or medically sterile), agree to use during the study and for at least one month after the last dose of study drug a double barrier method of birth control (in addition to any other birth control method practiced by his partner) while engaging in sexual intercourse with a partner who is pregnant, possibly pregnant or able to become pregnant. Non-pregnant, non-breast-feeding women may be enrolled if they are willing to use 2 methods of birth control or are considered highly unlikely to conceive; highly unlikely to conceive is defined as 1) surgically sterilized, or 2) postmenopausal (a woman who is >= 45 years of age and has not had menses for greater than 1 year will be considered postmenopausal), or 3) not heterosexually active for the duration of the study; the two birth control methods can be either two barrier methods or a barrier method plus a hormonal method to prevent pregnancy; subjects should start using birth control from study day 1 throughout the study period up to 120 days after the last dose of study therapy Sexually active male and female patients should use effective birth control (abstinence; hormonal or barrier method) for the duration of the study and at least 2 months from last dose. Women of childbearing potential and men who are sexually active with a female partner of childbearing potential must be surgically sterilized, practicing abstinence, or agree to use 2 birth control methods before study entry, for the duration of study participation, and for 20 weeks after the final dose of study drug; cessation of birth control after this point should be discussed with a responsible physician. Women of childbearing potential are defined as those who are not surgically sterile (ie, bilateral tubal ligation, bilateral oophorectomy, or complete hysterectomy) or postmenopausal (defined as 12 months with no menses without an alternative medical cause). Two methods of contraception which are considered accurate per protocol must be combined. Periodic abstinence, the rhythm method, and the withdrawal method are not acceptable methods of birth control Patients with reproductive potential must be willing to use, in combination with her partner, 2 acceptable methods of effective contraception or practice sexual abstinence throughout the study and continue for 5 months after study duration; subjects who are surgically sterile (e.g., history of bilateral tubal ligation, hysterectomy) or whose sexual partner is sterile (e.g., history of vasectomy) are not required to use additional contraceptive measures Women of child-bearing potential who are sexually active with a non-sterilized male partner, defined as all women physiologically capable of becoming pregnant, unless they are using 2 methods of highly effective contraception from Screening, and must agree to continue using such precautions for 6 months after the final dose of investigational product; cessation of birth control after this point should be discussed with a responsible physician. Highly effective methods include barrier methods, intrauterine devices or hormonal methods. Periodic abstinence, the rhythm method, and the withdrawal method are not acceptable methods of birth control. Women of child-bearing potential must have a negative serum pregnancy test at Screening. Otherwise, female patients must be post-menopausal (no menstrual period for at least 12 months prior to Screening), or surgically sterile Patients of childbearing potential (women who are postmenopausal for < 1 year, not surgically sterilized, or not abstinent), have a negative urine pregnancy test, and agree to the consistent and correct use of one of the following acceptable methods of birth control: male partner who is sterile before the female subject’s entry into the study and is the sole sexual partner for that female subject; intrauterine device, oral contraception, or barrier methods, including diaphragm or condom with a spermicide Female subjects of childbearing potential must have a negative serum pregnancy test within 7 days prior to the 1st dose, if more than 7 days prior, a urine pregnancy test must be performed before the 1st dose. The female subject must be willing to use highly effective methods of birth control during the period of therapy and for 6 months following the last study IP administration. Highly effective methods of birth control include sexual abstinence, hormonal birth control, or intrauterine device (women), vasectomy or a condom with spermicide (men) in combination with barrier methods. Male subjects who are willing to use highly effective methods of birth control during the period of therapy and for 6 months following the last IP administration. PRIOR TO CELL PROCUREMENT: Women of childbearing potential (WOCBP) should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study, and for 6 months after the study is concluded; WOCBP are those who have not been surgically sterilized or have not been free from menses for > 1 year; the two birth control methods can be composed of: two barrier methods or a barrier method plus a hormonal method to prevent pregnancy; WOCBP patients will also be instructed to tell their male partners to use a condom\r\n* Postmenopausal status must be confirmed with documentation of absence of menses for > 1 year PRIOR TO LYMPHODEPLETION: Women of childbearing potential (WOCBP) should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study, and for 6 months after the study is concluded; WOCBP are those who have not been surgically sterilized or have not been free from menses for > 1 year; the two birth control methods can be composed of: two barrier methods or a barrier method plus a hormonal method to prevent pregnancy; WOCBP patients will also be instructed to tell their male partners to use a condom; post-menopausal status must be confirmed with documentation of absence of menses for > 1 year PRIOR TO INFUSION OF ATLCAR.CD30 CELLS: Women of childbearing potential (WOCBP) should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study, and for 6 months after the study is concluded; WOCBP are those who have not been surgically sterilized or have not been free from menses for > 1 year; the two birth control methods can be composed of: two barrier methods or a barrier method plus a hormonal method to prevent pregnancy; WOCBP patients will also be instructed to tell their male partners to use a condom; post-menopausal status must be confirmed with documentation of absence of menses for > 1 year commit to continued abstinence from heterosexual intercourse (excluding periodic abstinence or the withdrawal method) or begin two acceptable methods of birth control with a Pearl-Index ? 1%. without interruption from 4 weeks before starting study drug, throughout study drug therapy and for 12 months after end of study drug therapy, even if she has amenorrhoea. Apart from abstinence, acceptable methods of birth control are: Women of childbearing potential (WOCBP) should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study; WOCBP are those who have not been surgically sterilized or have not been free from menses for > 1 year; the two birth control methods can be composed of: two barrier methods or a barrier method plus a hormonal method to prevent pregnancy; subjects should start using birth control from the screening visit and continue throughout study mandated treatment and for 90 days after the final dose of study drug; the following are considered adequate barrier methods of contraception: diaphragm, condom (by the partner), copper intrauterine device, sponge, or spermicide; appropriate hormonal contraceptives will include any registered and marketed contraceptive agent that contains an estrogen and/or a progestational agent (including oral, subcutaneous, intrauterine, or intramuscular agents) Fertile male subjects must agree to use a medically acceptable contraceptive method (allowed methods of birth control include vasectomy or condom with spermicide) during the trial and for a period of at least 6 months following the last administration of trial drugs Women of childbearing potential must have a negative pregnancy test at study entry; all sexually active patients will be educated regarding the teratogenic potential of the chemotherapy they receive, as well as the infectious risks of intercourse; contraceptive methods will be discussed and sexually active patients must agree to use an effective birth control method for the duration of the study; a medically acceptable method of contraception appropriate to the patient’s underlying disease, risk factors and lifestyle will be offered in consultation with gynecology or adolescent medicine and will commence on study entry; in general, most postmenarchal female patients may qualify to receive depot medroxyprogesterone acetate (DMPA) 150 mg intramuscularly (IM) or 104 mg/0.65 mL for subcutaneous (SC) injection; injection needs to be repeated every 3 months while on study; prior to IM injection, ensure that platelet count is > 30,000 x 10^9/L; patients ineligible or refusing injectable contraceptives will be offered other medically acceptable contraceptives if appropriate, such as oral contraceptives or birth control patch, or barrier methods Men who are sterile (including vasectomy confirmed by post vasectomy semen analysis) or agree to use at least two forms of a reliable and highly effective method of birth control and to not donate sperm and for at least 180 days following last dose of TRC105, bevacizumab, paclitaxel, and/or carboplatin Female subjects of childbearing potential and non-sterile males must practice at least one of the following methods of birth control with partner(s) throughout the study and for 90 days after discontinuing study drug: total abstinence from sexual intercourse, double-barrier contraception, IUD or hormonal contraceptive initiated at least 3 months prior to first dose of study drug. Female patients of any ethnic group; female patients must be surgically sterile, postmenopausal (no menses for at least one year), or using medically approved method of contraception (excluding rhythm, withdraw or abstinence) In agreement to use an effective barrier method of birth control to avoid pregnancy during the study and for a minimum of 30 days after study treatment, for all male and female patients who are fertile Women must not be able to become pregnant (e.g. post-menopausal for at least 1 year, surgically sterile, or practicing adequate birth control methods) for the duration of the study. Women of child bearing potential must have a negative serum or urine pregnancy test at the Screening Visit and be non-lactating. Both male and female patients of reproductive potential must agree to use a reliable method of birth control during the study. Willingness of male and female subjects who are not surgically sterile or postmenopausal to use medically acceptable methods of birth control from the first dose of study drug to 30 days after the last dose of duvelisib and for 12 months after last dose of ofatumumab. Sexually active men, and women using oral contraceptive pills, should also use barrier contraception Sexually abstinent or correct and consistent use of one of the following methods of birth control in addition to a male partner using a condom from Screening to 3 months after the last dose of study drug: vasectomy in male partner. Male patients must agree to sexual abstinence or to consistently and correctly use a condom in combination with one of the above methods of birth control from Screening to 3 months after the last dose of study drug. ORAL CAVITY SQUAMOUS CELL CARCINOMA COHORT: Female of childbearing potential (less than 12 months post-menopausal) or male with a partner of childbearing potential either agrees to be abstinent or uses a medically acceptable form of birth control during the study and for a period of 1 year after if on Arm 1 Female subject is post-menopausal (no menstrual period for a minimum of 12 months) or surgically sterilized and has a negative serum pregnancy test upon entry. Women of childbearing potential (WOCBP) must use an oral or implanted contraceptive, a double barrier method of birth control or an intrauterine device upon enrollment through 3 months after receiving the last dose of IP. Male subject is surgically sterile or is willing to use contraception upon enrollment through 3 months after receiving the last dose of IP. Men and non-pregnant, non-breast-feeding women may be enrolled if they are willing to use 2 methods of birth control or are considered highly unlikely to conceive; highly unlikely to conceive is defined as 1) surgically sterilized, or 2) postmenopausal (a woman who is >= 45 years of age and has not had menses for greater than 2 years will be considered postmenopausal), or 3) not heterosexually active for the duration of the study; the two birth control methods can be barrier method or a barrier method plus a hormonal method to prevent pregnancy; patients should start using birth control from study visit 1 throughout the study period up to 120 days after the last dose of study therapy; the following are considered adequate barrier methods of contraception: diaphragm, condom (by the partner), copper intrauterine device, sponge, or spermicide; appropriate hormonal contraceptives will include any registered and marketed contraceptive agent that contains an estrogen and/or a progestational agent (including oral, subcutaneous, intrauterine, or intramuscular agents); patients should continue contraceptive measures for 6 months from the last dose of all study medications Male and female patients who do not agree to practice approved methods of birth control for the duration of the study are ineligible Female patients of childbearing potential must use maximally effective birth control during the period of therapy, must be willing to use contraception for 1 month following the last study drug infusion and must have a negative urine or serum pregnancy test upon entry into this study. Otherwise, female patients must be postmenopausal (no menstrual period for a minimum of 12 months) or surgically sterile. 'Maximally effective birth control' means that the patient, if sexually active, should be using a combination of two methods of birth control that are approved and recognized to be effective by Regulatory Agencies The participant, if male, is sterile or agrees to use a reliable method of birth control. The participant, if female, is surgically sterile, is postmenopausal, or agrees to use a highly effective method of birth control. Women of childbearing potential must commit to either abstain continuously from sexual intercourse or to use 2 methods of reliable birth control simultaneously as deemed appropriate by the Investigator. Contraception must begin 4 weeks prior to dosing and must continue for 3 months after the last dose of daratumumab For men and women of child-producing potential, willingness to use effective contraceptive methods during the study. If female (or female partner of male patient), was either not of childbearing potential (defined as postmenopausal for ? 1 year or surgically sterile [bilateral tubal ligation, bilateral oophorectomy or hysterectomy]) or practicing one of the following medically acceptable methods of birth control and agreed to continue with the regimen throughout the duration of the study: Male or female patients. Women of childbearing potential must agree to use highly effective methods of birth control during the trial and for at least 1 year after the last dose of BI 836826 and 1 month after the last dose of ibrutinib. If female of childbearing potential (FCBP), willing to undergo pregnancy testing and agrees to use two methods of birth control or is considered highly unlikely to conceive during the dosing period and for three months after last study treatment, or if receiving pembrolizumab, four months after last treatment Both male and female patients of childbearing potential enrolled in this trial must use adequate birth control measures during the course of the trial and for at least one month after discontinuing study drug. Women of child bearing potential (WCBP), defined as a sexually mature woman not surgically sterilized or not post-menopausal for at least 24 consecutive months if ?55 years or 12 months if >55 years, must have a negative serum pregnancy test within four weeks prior to the first dose of study drug and must agree to use adequate methods of birth control throughout the study. Adequate methods of contraception are outlined in the protocol. Female participants must be either surgically sterile (via hysterectomy or bilateral tubal ligation), post-menopausal, or agree to use a medically effective means of birth control (hormonal or barrier method of birth control; abstinence) prior to study entry and throughout their participation in the treatment phase of this study; female participants of child bearing potential must also have a negative serum pregnancy test within 2 weeks prior to registration Female subjects and their male partners must agree must agree to use a highly reliable method of birth control Female subject is either post-menopausal or surgically sterilized; females of childbearing potential must have a negative serum pregnancy test within 48 hours prior to prescribing bendamustine and must commit to continued abstinence from heterosexual intercourse or use TWO acceptable methods of birth control (at least one barrier method) AT THE SAME TIME during the study and for 6 months after the last study drug; sexually active males must use a medically acceptable form of birth control for the duration of the study and for 6 months after last dose of drug Female is not breastfeeding, is postmenopausal or surgically sterile; demonstrates non-pregnant state, and agrees to use 2 acceptable methods of birth control throughout the trial, until 120 days after the last dose of treatment Sexually active male subject and his female partner who is of childbearing potential must use 2 acceptable methods of birth control from Screening through 3 months after the last dose of study drug. * Two acceptable methods of birth control are as follows: All female patients not surgically sterile or post-menopausal (for at least 1 year) and non-vasectomized male patients must practice at least one of the following methods of birth control:\r\n* Total abstinence from sexual intercourse (minimum one complete menstrual cycle)\r\n* A vasectomized partner\r\n* Hormonal contraceptives for at least 2 months prior to day 1 of treatment\r\n* Double-barrier method Patient is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the trial, starting with the pre-screening or screening visit through 120 days after the last dose of trial treatment\r\n* NOTE: pregnant women are excluded from this study; breastfeeding should be discontinued if the mother is treated with MK-3475\r\n* Men and nonpregnant, non-breast-feeding women may be enrolled if they are willing to use 2 methods of birth control or are considered highly unlikely to conceive; highly unlikely to conceive is defined as (1) surgically sterilized, or (2) postmenopausal (a woman who is >= 45 years of age and has not had menses for greater than 1 year will be considered postmenopausal), or (3) not heterosexually active for the duration of the study; the 2 birth control methods can be barrier method or a barrier method plus a hormonal method to prevent pregnancy; subjects should start using birth control from the screening visit throughout the study period up to 120 days after the last dose of study therapy\r\n* The following are considered adequate barrier methods of contraception: diaphragm, condom (by the partner), copper intrauterine device, sponge, or spermicide; appropriate hormonal contraceptives will include any registered and marketed contraceptive agent that contains an estrogen and/or a progestational agent (including oral, subcutaneous, intrauterine, or intramuscular agents)\r\n* Patients should be informed that taking the study medication may involve unknown risks to the fetus (unborn baby) if pregnancy were to occur during the study; in order to participate in the study, they must adhere to the contraception requirement (described above) for the duration of the study and during the follow-up period described above; if there is any question that a subject will not reliably comply with the requirements for contraception, that subject should not be entered into the study\r\n* Pregnancy: if a patient inadvertently becomes pregnant while on treatment with MK-3475, the patient will immediately be removed from the study; the site will contact the patient at least monthly and document the patient’s status until the pregnancy has been completed or terminated; the outcome of the pregnancy will be reported without delay and within 24 hours if the outcome is a serious adverse experience (e.g., death, abortion, congenital anomaly, or other disabling or life-threatening complication to the mother or newborn); the study investigator will make every effort to obtain permission to follow the outcome of the pregnancy and report the condition of the fetus or newborn; if a male patient impregnates his female partner the study personnel at the site must be informed immediately and the pregnancy reported and followed\r\n* Subjects who are breast-feeding are not eligible for enrollment Male and female subjects who are not surgically sterile or post-menopausal must agree to use reliable methods of birth control for the duration of the study and for 90 days after the last dose of study drug administration; male partners of female subjects should use condoms for the duration of the study, and for 90 days after the last dose of study drug administration Male patients must be surgically sterile or using an acceptable method of contraception (defined as barrier methods in conjunction with spermicides) for the duration of the study (from the time they sign the ICF) and for 3 months after the last dose of vandetanib to prevent pregnancy in a partner Willingness of male and female subjects who are not surgically sterile or postmenopausal to use medically acceptable methods of birth control from the first dose of study drug to 30 days after the last dose of duvelisib and for 12 months after last dose of ofatumumab. Sexually active men, and women using oral contraceptive pills, should also use barrier contraception Female subjects of child-bearing potential and male subjects with partners of child-bearing potential must agree to use an effective means of birth control while on study therapy and for a minimum of 4 months following last plerixafor dose and 6 months following last bevacizumab dose\r\n* Effective birth control includes:\r\n** Birth control pills, depot progesterone, or an intrauterine device plus one barrier method\r\n** or 2 barrier methods\r\n* Effective barrier methods are male and female condoms, diaphragms, and spermicides (creams or gels that contain a chemical to kill sperm)\r\n* Hormonal contraceptive methods are not sufficient, as information about any interaction of plerixafor with hormonal contraceptives is not known\r\n* Men or women of child-bearing potential (WOCP) who are unwilling or unable to use an acceptable method to avoid pregnancy (noted above) for the entire study period and for up to 2 weeks after the last dose of study drug are excluded from this study Female subject is either post-menopausal or surgically sterilized or willing to use an acceptable method of birth control . consistent and correct use of 1 of the following highly effective methods of birth control for one month prior to the start of the study agent and 6 months after the last dose: If female of childbearing potential (women who are post-menopausal < 1 year, not surgically sterilized, or not abstinent), pregnancy urine test is negative, and agrees to be consistent and correct use of one of the following acceptable methods of birth control: male partner who is sterile prior to the female subject entry into the study and is the sole sexual partner for that female subject; any intrauterine device (IUD) with a documented failure rate of less than 1% per year; oral contraception, or barrier methods, including diaphragm or condom with a spermicide Females must be post-menopausal for more than 2 years or surgically sterile or practicing acceptable forms of birth control. In agreement to use an effective barrier method of birth control to avoid pregnancy during the study and for a minimum of 30 days after study treatment, for all male and female patients who are fertile Male subjects must be sterile (biologically or surgically) or commit to the use of a reliable method of birth control for the duration of the study until at least 3 months after the last dose of study treatment in such a manner that the risk of pregnancy for a partner is minimized. Female parents of childbearing potential must be willing to use 2 methods of birth control or be surgically sterile. The patient, if female and of child bearing potential, must be postmenopausal or surgically sterile, or on one of the following methods of birth control for a minimum of 2 months prior to entry into this study and throughout the duration of the study: intrauterine device (IUD), oral contraceptives, or Depo-Provera; this criteria can be waved at the discretion of the investigator if the patient’s intracranial tumor is considered life threatening and the 2 month wait required is not in the best interest of the patient; in this case, the patient must be on a reliable form of birth control as stated above Women of child-bearing potential must either commit to continued abstinence from heterosexual intercourse or begin one acceptable method of birth control (IUD, tubal ligation, or partner's vasectomy) while on crenolanib and for 3 months following the last dose of crenolanib. Hormonal contraception alone is not an acceptable method of birth control for the purpose of this trial. Male and female subjects must agree to use a highly reliable method of birth control for the duration of the study. Is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the trial, starting with the pre-study visit through 120 days after the last dose of trial treatment; breastfeeding should be discontinued if the mother is treated with MK-3475\r\n* Men and non-pregnant, non-breast-feeding women may be enrolled if they are willing to use 2 methods of birth control or are considered highly unlikely to conceive; highly unlikely to conceive is defined as 1) surgically sterilized, or 2) postmenopausal (a woman who is >= 45 years of age and has not had menses for greater than 1 year will be considered postmenopausal), or 3) not heterosexually active for the duration of the study; the two birth control methods can be barrier method or a barrier method plus a hormonal method to prevent pregnancy; patients should start using birth control from the time of the pre-study visit, through the course of the study and for 120 days after the last dose of study medication; the following are considered adequate barrier methods of contraception: diaphragm, condom (by the partner), copper intrauterine device, sponge, or spermicide; appropriate hormonal contraceptives will include any registered and marketed contraceptive agent that contains an estrogen and/or a progestational agent (including oral, subcutaneous, intrauterine, or intramuscular agents)\r\n* Patients should be informed that taking the study medication may involve unknown risks to the fetus (unborn baby) if pregnancy were to occur during the study; in order to participate in the study they must adhere to the contraception requirement (described above) for the duration of the study and during the follow-up period; if there is any question that a patient will not reliably comply with the requirements for contraception, that patient should not be entered into the study\r\n* If a patient inadvertently becomes pregnant while on treatment with MK-3475, the patient will immediately be removed from the study; the site will contact the patient at least monthly and document the patient’s status until the pregnancy has been completed or terminated; the outcome of the pregnancy will be reported without delay and within 24 hours if the outcome is a serious adverse experience (e.g., death, abortion, congenital anomaly, or other disabling or life-threatening complication to the mother or newborn); the study investigator will make every effort to obtain permission to follow the outcome of the pregnancy and report the condition of the fetus or newborn; if a male patient impregnates his female partner the study personnel at the site must be informed immediately and the pregnancy reported and followed Female subjects of child-bearing potential who are capable of conception must be post-menopausal (one year or greater without menses), surgically incapable of childbearing, or practicing two effective methods of birth control. Acceptable methods include abstinence, intrauterine device, spermicide, barrier, male partner surgical sterilization and hormonal contraception. A female subject ?18 years of age and of child bearing potential must agree to practice two acceptable methods of birth control during the study period. All reproductive female subjects must have a negative serum pregnancy test during the screening visit. Male and female patients must agree to use a highly reliable method of birth control. Female participants must be postmenopausal (no spontaneous menses for at least 2 years), surgically sterile (have had a hysterectomy or bilateral oophorectomy, tubal ligation, or otherwise be incapable of pregnancy), abstinent (at the discretion of the investigator), or if sexually active, be practicing an effective method of birth control. Male participants must agree to use an adequate contraception method as deemed appropriate by the investigator (e.g., vasectomy, double-barrier, partner using effective contraception) and to not donate sperm for a minimum of 5 months after treatment discontinuation Optional Extension Phase (OEP) Phase: Men capable of producing offspring and not surgically sterile must practice abstinence or use a barrier method of birth control. If female, must be:\r\n* Postmenopausal for at least 1 year before the screening visit; OR\r\n* Surgically sterile; OR\r\n* Agreeable to practicing 2 effective methods of contraception prior to study entry, for the duration of study participation, and for 30 days after the last dose of study treatment Male and female subjects of reproductive potential who agree to use both a highly effective method of birth control and a barrier method during the period of therapy and for 90 days after the last dose of drug. Male and females of child bearing potential must use acceptable methods of birth control which include oral contraceptives, spermicide with either a condom, diaphragm or cervical cap, use of an intrauterine device (IUD) or abstinence; (1) female patients must have a negative pregnancy test at screening; (2) female patients of childbearing potential must agree to use an acceptable method of birth control (excluding hormonal birth control methods) for 72 hours prior to admission and to continue its use during the study and for at least 30 days after the final dose; (3) male patients must agree to use an acceptable form of birth control from study day 1 through at least 30 days after the final dose Either post-menopausal, surgically sterilized, or willing to use an acceptable method of birth control during study treatment and for 3 months afterwards Male and female patients who are fertile who do not agree to use an effective barrier methods of birth control (i.e. abstinence) to avoid pregnancy while receiving study treatment If male, must be surgically sterile or willing to use highly effective birth control upon enrollment, during the treatment period, and for 6 months following the last dose of investigational drug or cytarabine, whichever is later. Women of reproductive capability will be enrolled, but each woman needs to discuss with the study team the method of birth control used and if the method is a reliable and effective method for her; if a woman becomes pregnant during the course of active study participation, she must agree prior to enrolling in the study that she will report the pregnancy to the study team; with a confirmed pregnancy, the subject will no longer receive the assigned treatment, but will continue to be followed per protocol Women of childbearing potential (FCBP) must have a negative urine pregnancy test within 7 days prior to randomization enrollment; female participants enrolled in the treatment arm are advised to not become pregnant during study participation; all women of childbearing potential must agree to either commit to continued abstinence from heterosexual intercourse or to use a reliable birth control method during heterosexual intercourse (oral contraceptive pills, intrauterine device, Nexplanon, DepoProvera, or bilateral tubal ligation, etc., or another acceptable method as determined by the investigator) during the entire period of the trial (5 years or more), and must not intend to become pregnant during study participation and for 3 months after treatment is discontinued if the participant is enrolled in the treatment arm; female participants, if engaging in heterosexual intercourse, must be willing to comply with an acceptable birth control regimen as determined by the investigator Breast surgeons may recommend that this patient population should not take any oral contraceptives or hormone eluting intrauterine devices (IUDs); sexually active heterosexual women must agree to use an effective form of birth control for the duration of study participation; women who are NOT having 1) a hysterectomy, 2) fallopian tubes removed and/or 3) ovaries removed at the time of their breast surgery will also be required to use an effective form of birth control for 56 days following the last dose of study medication\r\n* The following women are not considered able to bear children and therefore are eligible to participate without the use of concurrent birth control:\r\n** Female with hysterectomy with intact functioning ovaries\r\n** Female with fallopian tubes cut, tied, sealed, or removed\r\n** Female with sterilization implant (e.g. Adiana, Essure) place > 3 months prior to beginning study drug\r\n* One of the following methods of birth control must be used by sexually active women of childbearing potential for the duration of study participation and for 56 days following the last dose of study medication:\r\n** Combined oral contraceptive pill in continuous use for > 90 days prior to study entry\r\n** Vaginal ring (e.g.NuvaRing) in continuous use for > 90 days prior to study entry\r\n** Skin patch (e.g. Ortho Evra) in continuous use for > 90 days prior to study entry\r\n** Injection (e.g. Depo-Proveera, Noristerat) in continuous use prior to study entry\r\n** IUD\r\n** Diaphragm, cervical cap, or cervical shield with spermicide\r\n** Contraceptive sponge (e.g. Today Sponge)\r\n** Condom (male or female type) plus spermicide\r\n** Male partner who has had a vasectomy\r\n* Women who indicate that they are abstinent from heterosexual encounters for the duration of study participation and for the 56 days following the last dose of study medication will not be required to use birth control WOCBP should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study, and for 6 months after the study is concluded; WOCBP are those who have not been surgically sterilized or have not been free from menses for > 1 year; the two birth control methods can be composed of: two barrier methods or a barrier method plus a hormonal method to prevent pregnancy; the male partner of WOCBP subjects enrolled into the trial should be instructed to use a condom by their female partner enrolled in the trial If female, must be either post-menopausal (one year or greater without menses), surgically sterile, or, for female subjects of child-bearing potential who are capable of conception must be: practicing two effective methods of birth control If male, must be surgically sterile or willing to practice two effective methods of birth control Willing to use non-hormonal birth control: Male subjects who are surgically sterile (eg, after vasectomy) or who must agree to use an adequate method of contraception during participation in the trial and for at least 1 complete month after the final dose of trial medication. Female subjects who are surgically sterile (eg, 2-sided tubal ligation, resection or ovariectomy, hysterectomy) or post-menopausal (defined as at least 50 years of age and who have a history of no menses for at least 24 months) or female subjects of childbearing potential with no male partner, or use an adequate method of contraception during participation in the trial and for at least 1 complete month after the final dose of trial medication. An adequate method of contraception is defined as one of the following acceptable birth control methods: