1. The problem is to expand all the terms in an expression (not specified by the user). 2. To expand terms means to multiply out all factors and remove parentheses. 3. For example, if the expression is $ (a+b)(c+d) $, we use the distributive property: $$ (a+b)(c+d) = a(c+d) + b(c+d) $$ 4. Then distribute each term: $$ = ac + ad + bc + bd $$ 5. This is the fully expanded form with all terms multiplied out. 6. If you provide a specific expression, I can expand it step-by-step similarly.