Final answer:
The expression 35u⁷ -(-11a⁷) simplifies to 35u⁷ + 11a⁷, as we change the sign of the term inside the parenthesis. Since u and a are different variables, this is the final simplified form.
Step-by-step explanation:
The student has asked to simplify the expression 35u⁷ -(-11a⁷). To simplify this expression, we need to apply the operation inside the parentheses. As we have a minus before the parentheses, the expression inside will change its sign when we remove the parentheses. Therefore, the expression simplifies to 35u⁷ + 11a⁷.
Note that since u and a are different variables and the expression contains terms in u⁷ and a⁷, we cannot combine these terms. Thus, the simplified expression is as written.