计算(-3x^2y)×(1/3xy^2)
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计算(-3x^2y)×(1/3xy^2)
计算(-3x^2y)×(1/3xy^2)
计算(-3x^2y)×(1/3xy^2)
(-3x^2y)×(1/3xy^2)
=-x^3y^3
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