subtract the polynomial multiple questions 100points+brainleist
1) (-x^{2} -5x-3)-(-7x^{2} -8x-8)
2) (-2x^{3}+x) -(7x-3-7x^{3})
3) (3x^{3} +3x^{2} +9)-(5x^{3} -7x^{2} +6x-9)
4) (5x^{3} +5x^{2} +5)-(6x^{3} -6x^{2} +8x-5)
5) (5x^{3} +3x^{2} +5) - (7x^{3} -9x^{2} +8x-5)