(-x²)³-3x²(x四次方+2x-2)

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(-x²)³-3x²(x四次方+2x-2)
(-x²)³-3x²(x四次方+2x-2)

(-x²)³-3x²(x四次方+2x-2)
(-x²)³-3x²(x四次方+2x-2)
=-x^6-3x^6-6x^3+6x^2
= -4x^6-6x^3+6x^2