作业帮.(3xy²)²+(-4xy³)(-xy) (3xy²)²+(-4xy³)(-xy)
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.(3xy²)²+(-4xy³)(-xy) (3xy²)²+(-4xy³)(-xy)
.(3xy²)²+(-4xy³)(-xy)
(3xy²)²+(-4xy³)(-xy)
.(3xy²)²+(-4xy³)(-xy) (3xy²)²+(-4xy³)(-xy)