This math topic focuses on converting interval notation to set builder notation, specifically for function domain and range that include unions. It practices rewriting composite intervals, like disjoint sets combining different types of bounds (i.e., open, closed, and infinite intervals), into the set builder format. The problems ask students to identify correct set builder forms representative of given intervals, developing their ability to work with and interpret various mathematical expressions related to domain and range. Additionally, students are expected to understand symbols and notation representing real numbers, inequalities, and logical disjunctions (ors).