While simplifying some math work, Peter wrote on his paper that x3 • x3 • x3 • x3 equaled x3 + 3 + 3 + 3. Did Peter simplify his work correctly and completely to a final answer? Would Peter's work be the same if he were to simplify x3 + x3 + x3 + x3?

Yes, Peter simplified his work completely. The expression x3 • x3 • x3 • x3 is equal to x3 + 3 + 3 + 3. It would not be the same as x3 + x3 + x3 + x3. This is in accordance with rules for exponents which is (x^ m) (x^ n) = x^ (m + n). Hope this answers the question.