(3xy^2)^2+(-4xy^3)*(-xy)还有(-2x^3)^3*(1/2x^2)^2

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(3xy^2)^2+(-4xy^3)*(-xy)还有(-2x^3)^3*(1/2x^2)^2(3xy^2)^2+(-4xy^3)*(-xy)还有(-2x^3)^3*(1/2x^2)^2(3xy^2)^

(3xy^2)^2+(-4xy^3)*(-xy)还有(-2x^3)^3*(1/2x^2)^2
(3xy^2)^2+(-4xy^3)*(-xy)还有(-2x^3)^3*(1/2x^2)^2

(3xy^2)^2+(-4xy^3)*(-xy)还有(-2x^3)^3*(1/2x^2)^2
(3xy^2)^2+(-4xy^3)*(-xy)
=9x^2y^4 +4x^2y^4
=13x^2y^4
还有(-2x^3)^3*(1/2x^2)^2
=-8x^9×1/4x^4
=-2x^13