5x+y+2y-10+8x
-2+7x-8x-4-7x
6x-(-10x)
5+2x-10y+10y+x
x-7(-4+7x)+9
x+9y+3+x+y+1
5(2x-5)+3(4+6x)
-x-4y-8-9x+y+10
-6(4x^{2}+x+2)+x
3x-4y+2-7x+y-6