= 10x*x^2 + 10x * 4x - 5*10x = 10x^3 + 40x^2 - 50x
= 6x*2x-6x*3+1*2x-1*3 = 12x^2-18x+2x-3 = 12x^2 - 16x - 3
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= 10x*x^2 + 10x * 4x - 5*10x = 10x^3 + 40x^2 - 50x
= 6x*2x-6x*3+1*2x-1*3 = 12x^2-18x+2x-3 = 12x^2 - 16x - 3
12x^2-18x+2x-3=12x^2-16x-3