[a²(x-y)]³

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[a²(x-y)]³[a²(x-y)]³[a²(x-y)]³[a²(x-y)]³=a^6(x-y)³=a^6(

[a²(x-y)]³
[a²(x-y)]³

[a²(x-y)]³
[a²(x-y)]³
=a^6(x-y)³
=a^6(x-y)(x²+xy+y²)