Perform the indicated operations and simplify. (a+45/25-a^2)-(a+9/a+5)+(a-9/5-a)

Question

I can't remember if I have to multiply the (a+9/a+5) by -1/-1 to get 5-a as the denominator.  Please help, I'm in a quiz and it's timed.  Thank you.  Also, I don't need the entire solution, I don't want to cheat.  I just need to know if that's how I get the proper denominator.  Thanks!

Answer 1

(hand notes since it looks messier to type with so many parentheses and fraction bars)