x^3 y^3(x-y)^3+x^2y^2(y-x)^2，要过程shuihuia

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x^3 y^3(x-y)^3+x^2y^2(y-x)^2，要过程shuihuia
x^3 y^3(x-y)^3+x^2y^2(y-x)^2，要过程shuihuia

x^3 y^3(x-y)^3+x^2y^2(y-x)^2，要过程shuihuia
这么表示不就行了 x^3

呵呵
把题目发上来呀

^3

x^3 y^3(x-y)^3+x^2y^2(y-x)^2=x^2 y^2(x-y)^2[xy（x-y)+1]=x²y²(x-y)²(x²y-xy²+1)

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