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3x^3y^3(-2/3x^2y)^2+(-1/3x^2y)^39xy^2
=3x^3y^3(4x^4y^2/9﹚+﹙-1/27﹚·x^6y^3·9xy^2
=4x^7y^5/3-x^7y^5/3
=x^7y^5
=﹣32
=3x^3y^3(4x^4y^2/9﹚+﹙-1/27﹚·x^6y^3·9xy^2
=4x^7y^5/3-x^7y^5/3
=x^7y^5
=﹣32
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