Additional Study Information: The purpose of this research study is to determine the safety and tolerability of XmAb20717 by itself and in combination with other anticancer therapies (Olaparib, Cabazitaxel, Docetaxel, and Carboplatin). XmAb20717 has not been studied in a significant number of humans, therefore, some of its effects are unknown. XmAb20717 is an investigational antibody-drug. An antibody is a kind of protein that your body makes to help fight infections. AmAb20717 is an investigational drug in this study because it has not been approved by the U.S. Food and Drug Administration (FDA), the health authority that gives approval for new medicines to be prescribed in the United States. The study will enroll subjects into one of 5 treatment groups based on specific information about your tumor.