作业帮-(-x)^2*(-2x^2y)^3+2x^2(x^6y^3-1)
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-(-x)^2*(-2x^2y)^3+2x^2(x^6y^3-1)
-(-x)^2*(-2x^2y)^3+2x^2(x^6y^3-1)
-(-x)^2*(-2x^2y)^3+2x^2(x^6y^3-1)
原式=-x²*(-8x^6y³)+2x^8y³-2x²
=8x^6y³+2x^8y³-2x²
=10x^6y^3-2x²
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