8Xcube-(2x-y)the whole cube.
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8x^3 -(2x-y)^3
8x^3-{2x^3 -y^3 -3*2x*y(2x-y)}
8x^3-2x^3+y^3-12x^2y+6xy^2
6x^3-12x^2y-2x^3+6xy^2
hope it helps. n happy new year...
8x^3-{2x^3 -y^3 -3*2x*y(2x-y)}
8x^3-2x^3+y^3-12x^2y+6xy^2
6x^3-12x^2y-2x^3+6xy^2
hope it helps. n happy new year...
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