(x-y)的三次方*(x-y)的平方*(y-x)

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(x-y)的三次方*(x-y)的平方*(y-x)
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(x-y)的三次方*(x-y)的平方*(y-x)
(x-y)的三次方*(x-y)的平方*(y-x)

(x-y)的三次方*(x-y)的平方*(y-x)
(x-y)^3 * (x-y)^2 * (y-x)
= (x-y)^3 * (x-y)^2 * {-(x-y) }
=- (x-y)^3 * (x-y)^2 * (x-y)
=- (x-y)^6

(x-y)的三次方*(x-y)的平方*(y-x) =-(x-y)∧6