计算:(-3x^y)(1/3xy^2)=?
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计算:(-3x^y)(1/3xy^2)=?
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(-3x^y)(1/3xy^2)
=-3*1/3*x^3y^3
=-x^3y^3
=-3*1/3*x^3y^3
=-x^3y^3
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