Patients must be able to tolerate oral medications by mouth, and not have a gastrointestinal illness that would preclude absorption of olaparib Inability to swallow oral medications (capsules and tablets) without chewing, breaking, crushing, opening or otherwise altering the product formulation. Patients should not have gastrointestinal illnesses that would preclude the absorption of BGB-290, which is an oral agent. Patients must be able to tolerate oral medications and not have gastrointestinal processes that would preclude absorption of olaparib Any known gastrointestinal disorders which would preclude oral administration of 5-azacitidine COHORT 1: HORMONE RECEPTOR POSITIVE BREAST CANCER: Patients must be able to swallow oral medications (capsules) without chewing, breaking, crushing, opening or otherwise altering the product formulation COHORT 1: HORMONE RECEPTOR POSITIVE BREAST CANCER: Known history of gastrointestinal illnesses that would preclude the absorption of ONC201, which is an oral agent COHORT 2: TRIPLE NEGATIVE BREAST CANCER: Patients must be able to swallow oral medications (capsules) without chewing, breaking, crushing, opening or otherwise altering the product formulation COHORT 2: TRIPLE NEGATIVE BREAST CANCER: Known history of gastrointestinal illnesses that would preclude the absorption of ONC201, which is an oral agent COHORT 3: ENDOMETRIAL CANCER: Patients must be able to swallow oral medications (capsules) without chewing, breaking, crushing, opening or otherwise altering the product formulation COHORT 3: ENDOMETRIAL CANCER: Known history of gastrointestinal illnesses that would preclude the absorption of ONC201, which is an oral agent Patients must be able to swallow oral medications and not have gastrointestinal illnesses that would preclude absorption of cediranib or olaparib Patients must be able to swallow and retain oral medications and be without gastrointestinal illnesses that would preclude absorption of AZD8186 Patients must be able to tolerate oral medications and not have gastrointestinal illnesses that would preclude absorption of cediranib or olaparib Able to tolerate oral medications and no GI illnesses that would preclude absorption of olaparib UROTHELIAL CARCINOMA EXPANSION COHORT: Patients must be able to tolerate oral medications and not have gastrointestinal illnesses that would preclude absorption of olaparib Ability to swallow oral medications (capsules and tablets) without chewing, breaking, crushing, opening or otherwise altering the product formulation. Patients should not have gastrointestinal illnesses that would preclude the absorption of olaparib, which is an oral agent. For the gastric cancer cohort, patients with a full or partial gastrectomy will be permitted. PHASE I STUDY ELIGIBILITY CRITERIA:\r\nPatients must be able to swallow oral medications (capsules and tablets) without chewing, breaking, crushing, opening or otherwise altering the product formulation; they should not have gastrointestinal illnesses that would preclude the absorption of cediranib or olaparib, which are oral agents PHASE II STUDY COHORT 1 OVARIAN CANCER ELIGIBILITY CRITERIA (MEDI+O, MEDI+C AND MEDI+O+C): \r\nPatients must be able to swallow oral medications (capsules and tablets) without chewing, breaking, crushing, opening or otherwise altering the product formulation; they should not have gastrointestinal illnesses that would preclude the absorption of cediranib or olaparib, which are oral agents PHASE II STUDY COHORT 5 TRIPLE NEGATIVE BREAST CANCER ELIGIBILITY CRITERIA (MEDI+O ONLY):\r\nPatients must be able to swallow oral medications (capsules and tablets) without chewing, breaking, crushing, opening or otherwise altering the product formulation; they should not have gastrointestinal illnesses that would preclude the absorption of cediranib or olaparib, which are oral agents PHASE II COLORECTAL CANCER COHORT 6 (MEDI+C ONLY):\r\nPatients must be able to swallow oral medications without chewing, breaking, crushing, opening or otherwise altering the product formulation; they should not have gastrointestinal illnesses that would preclude the absorption of cediranib which are an oral agent Patients must be able to swallow and retain oral medications and without gastrointestinal illnesses that would preclude absorption of cediranib or olaparib Able to swallow and retain oral medications and without gastrointestinal (GI) illnesses that would preclude absorption of cediranib or olaparib Patient is able to tolerate oral medications and does not have gastrointestinal illnesses that would preclude absorption of either olaparib or BKM120 or BYL719 Able to swallow and retain oral medications and without gastrointestinal illnesses that would preclude absorption of cediranib or olaparib Patients must be able to tolerate oral medications and not have gastrointestinal illnesses that would preclude absorption of cediranib or olaparib Patients must be able to swallow and tolerate oral medications and not have gastrointestinal illnesses that would preclude absorption of AZD2014, AZD5363, or olaparib (e.g. uncontrolled nausea, vomiting, or diarrhea; malabsorption syndrome; ulcerative disease) Patients must be able to tolerate oral medications and not have gastrointestinal illnesses that would preclude absorption of GSK1120212 and GSK2141795 Any known gastrointestinal disorders which would preclude oral administration of 5-azacitidine Patients must be able to tolerate oral medications and not have gastrointestinal illnesses that would preclude absorption of cediranib or olaparib Patients must be able to swallow oral medications (capsules and tablets) without chewing, breaking, crushing, opening or otherwise altering the product formulation Patients must be able to swallow and tolerate oral medications and not have gastrointestinal illnesses that would preclude absorption of AZD1775 (e.g. uncontrolled nausea, vomiting, or diarrhea; malabsorption syndrome; ulcerative disease); Note: patient may not have a percutaneous endoscopic gastrostomy (PEG) tube or be receiving total parenteral nutrition (TPN) Patients must be able to swallow and tolerate oral medications and not have gastrointestinal illnesses that would preclude absorption of BMN 673 (e.g. uncontrolled nausea, vomiting, or diarrhea; malabsorption syndrome; ulcerative disease)