x^3+3x^2-x=x^3+9x-x=x^3+8x
4x^3+2x^2-x=64x+4x-x=68x-x=67x
5x^2-3x^3+4x=25x-27x+4x=-2x+4x=2x
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x^3+3x^2-x=x^3+9x-x=x^3+8x
4x^3+2x^2-x=64x+4x-x=68x-x=67x
5x^2-3x^3+4x=25x-27x+4x=-2x+4x=2x