计算:2x^2y^3+(4x^2y^3)-(-3x^2y^3)
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计算:2x^2y^3+(4x^2y^3)-(-3x^2y^3)
计算:2x^2y^3+(4x^2y^3)-(-3x^2y^3)
计算:2x^2y^3+(4x^2y^3)-(-3x^2y^3)
2x^2y^3+(4x^2y^3)-(-3x^2y^3)
=x^2y^3[2+4-(-3)]
=9x^2y^3
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