2*(x-y)²(y-x)(xy)

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2*(x-y)²(y-x)(xy)2*(x-y)²(y-x)(xy)2*(x-y)²(y-x)(xy)=-2xy(x-y)³请问我温热鹅鹅鹅饿呃呃呃呃呃呃呃呃呃

2*(x-y)²(y-x)(xy)
2*(x-y)²(y-x)(xy)

2*(x-y)²(y-x)(xy)
= -2xy(x-y)³

请问我温热鹅鹅鹅饿呃呃呃呃呃呃呃呃呃