xy²(3x²y-xy²+y)

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xy²(3x²y-xy²+y)

xy²(3x²y-xy²+y)
xy²(3x²y-xy²+y)

xy²(3x²y-xy²+y)
xy²(3x²y-xy²+y)
=3x³y³-x²y^4+xy³