[(x-y)(y-z)]的3次幂-[(y-x)(y-z)]的3次幂等于什么

[(x-y)(y-z)]³-[(y-x)(y-z)]³
=[(x-y)(y-z)]³-[-(x-y)(y-z)]³
=[(x-y)(y-z)]³+[(x-y)(y-z)]³
=2[(x-y)(y-z)]³
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