(x-y)²×(y-x)³

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(x-y)²×(y-x)³
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(x-y)²×(y-x)³
(x-y)²×(y-x)³

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