What is the simplified expression for Negative 2 a squared b + a squared minus 5 a b + 3 a b squared minus b squared + 2 (a squared b + 2 a b)? a squared minus 9 a b + 3 a b squared a squared + 9 a b minus b squared + 3 a b squared 10 a b + a squared minus b squared 3 a b squared + a squared minus b squared minus a b