(5ab-4a-8)-(9ab-5) Ok just remember that the minus sign before the (9ab-5) is like a minus 1 so it changes the sign inside the bracket... >>5ab-4a-8-9ab+5 >>-4ab-4a-3 I'm guessing you just have to leave it like that unless there are other parts to the question or whatever but that's that simplified as far as it can be!
