(x-y)的3次方·(y-x)²

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(x-y)的3次方·(y-x)²(x-y)的3次方·(y-x)²(x-y)的3次方·(y-x)²=(x-y)³×(x-y)²=(x-y)的5次方

(x-y)的3次方·(y-x)²
(x-y)的3次方·(y-x)²

(x-y)的3次方·(y-x)²
=(x-y)³×(x-y)²
=(x-y)的5次方