计算 (-1/3xy+3/2y^2-x^2)(-6xy^2)^2
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计算 (-1/3xy+3/2y^2-x^2)(-6xy^2)^2
计算 (-1/3xy+3/2y^2-x^2)(-6xy^2)^2
计算 (-1/3xy+3/2y^2-x^2)(-6xy^2)^2
(-1/3xy+3/2y^2-x^2)(-6xy^2)^2
=(-1/3xy+3/2y^2-x^2)(36x^2y^4)
=-12x^3y^5+54x^2y^6-36x^4y^4
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