How do I find the answer to this question?

Question

(9x squared + 6x- 3)- (-5x squared + 8x-8)

Answer 1

9x^2 + 6x - 3 -(5x^2 + 8x - 8) =

9x^2 + 6x - 3 + 5x^2 - 8x + 8 =

14x^2 - 2x + 5

I hope this helps.