Answer: 4x^2 + 3x - 9 granted this isnt my work so it might help you, if it doesnt let me know so i dont get someone else an F lol
Explanation:
Q = 3x^2 + 5x - 2
R = 2 - x^2
S = 2x + 5
Q - [R + S]
(3x^2 + 5x - 2) - [(2 - x^2) + (2x + 5)]
(3x^2 + 5x - 2) - [-x^2 + 2x + 7]
3x^2 + 5x - 2 + x^2 - 2x - 7
4x^2 + 3x - 9