1)(1-3а)+(а^2+2a) = 1 - 3а + а^2 +2a = a^2-a+12)(2х^2-5x)+(-x+14) = 2x^2-5x-x+14=2x^2 -6x+143)(y^2-5y)+(-2y^2+5y+1) = y^2 -5y-2y^2+5y+1=-y^2+14)(p^2+2p+7)-(p^2+3p+18) = p^2+ 2p +7 -p^2-3p-18=-p-185)(9k^3+13k^2)-(8-7k+12k^2)=9k^3+13k^2-8+7k-12k^2=9k^3+k^2+7k-86)(a^2+15a+14)-(a^2+15a-14) = 28
1)(1-3а)+(а^2+2a) = 1 - 3а + а^2 +2a = a^2-a+1
2)(2х^2-5x)+(-x+14) = 2x^2-5x-x+14=2x^2 -6x+14
3)(y^2-5y)+(-2y^2+5y+1) = y^2 -5y-2y^2+5y+1=-y^2+1
4)(p^2+2p+7)-(p^2+3p+18) = p^2+ 2p +7 -p^2-3p-18=-p-18
5)(9k^3+13k^2)-(8-7k+12k^2)=9k^3+13k^2-8+7k-12k^2=9k^3+k^2+7k-8
6)(a^2+15a+14)-(a^2+15a-14) = 28