x(4x-4x)+2x(x+3x)-4x(-x-x)
x(0) +2x(4x) -4x(-2x)
0 +8x²+8x²
16x²
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x(4x-4x)+2x(x+3x)-4x(-x-x)
x(0) +2x(4x) -4x(-2x)
0 +8x²+8x²
16x²