(-3/2xy)·(2/3x²y-4xy²+4/3y)=

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(-3/2xy)·(2/3x²y-4xy²+4/3y)=

原式=(-3/2xy)·2/3x²y-(-3/2xy)·4xy²+(-3/2xy)·4/3y
=-x³y²+6x²y³-2xy²