计算{-1/3x^2}^3*(-3xy^2)^2
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计算{-1/3x^2}^3*(-3xy^2)^2计算{-1/3x^2}^3*(-3xy^2)^2计算{-1/3x^2}^3*(-3xy^2)^2{-1/3x^2}^3*(-3xy^2)^2=-1/27
计算{-1/3x^2}^3*(-3xy^2)^2
计算{-1/3x^2}^3*(-3xy^2)^2
计算{-1/3x^2}^3*(-3xy^2)^2
{-1/3x^2}^3*(-3xy^2)^2
=-1/27x^6*9x^2y^4
=-1/3x^(6+2)y^4
=-1/3x^8y^4
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