(-3x^2+x^2-12x^2) (-2y^2-3y^2-5y^2) (xy+6xy-3xy+xy-4xy-15xy)
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Step-by-step explanation:
(-3x²+x²-12x²)×(-2y²-3y²-5y²)×(xy+6xy-3xy+xy-4xy-15xy)
=(-14x²)×(-10y²)×(-14xy)
=-1960x³y³
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