-3x(-2x+6)-x(4x-2) = 6x²-18x-4x²+2x = 2x²-16x
6(2x-5)+2x(4x-10) = 12x-30+8x²-20x = 8x²-8x-30
-4(6-5x)-9x(2x+3) = -24+20x-18x²-27x = -18x²-7x-24
-5x(2x-7)+4(3-8x) = -10x²+35x+12-32x = -10x²+3x+12
(8+2x)×3+7(3x-5) = 24+6x+21x-35 = 27x-11
-3x(4x-8)+5x(-7+2x) = -12x²+24x-35x+10x² = -2x²-11x
5x(6-7x)+x(8-2x) = 30x-35x²+8x-2x² = -37x²+38x
4x(-2x+3)+2x(3x-5) = -8x²+12x+6x²-10x = -2x²+2x
2(5-2x)-2x(4+5x) = 10-4x-8x-10x² = -10x²-12x+10
7x(3x-2)-2x(-6+x) = 21x²-14x+12x-2x² = 19x²-2x
-4(x+3)+5(6+x) = -4x-12+30+5x = x+18
