(x-y)³×(x-y)²×(y-x)

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

(x-y)³×(x-y)²×(y-x)
(x-y)³×(x-y)²×(y-x)
=(x-y)³×(x-y)²×[-(x-y)]
=-(x-y)^(3+2+1)
=-(x-y)^6