x^3 y^3(x-y)^3+x^2y^2(y-x)^2，要过程shuihuia
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x^3y^3(x-y)^3+x^2y^2(y-x)^2，要过程shuihuiax^3y^3(x-y)^3+x^2y^2(y-x)^2，要过程shuihuiax^3y^3(x-y)^3+x^2y^2(y
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)
x(x-y)2-(y-x)3
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
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2X(2X-3Y)-3Y(X+Y)
(-2x y)^2-(3y-x)(-x-3y)
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