【（-2x^2y^3)^2*x-2x(5xy^2)^3】/（9x^2y^6）
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【（-2x^2y^3)^2*x-2x(5xy^2)^3】/（9x^2y^6）【（-2x^2y^3)^2*x-2x(5xy^2)^3】/（9x^2y^6）【（-2x^2y^3)^2*x-2x(5xy^2
【（-2x^2y^3)^2*x-2x(5xy^2)^3】/（9x^2y^6）
【（-2x^2y^3)^2*x-2x(5xy^2)^3】/（9x^2y^6）
【（-2x^2y^3)^2*x-2x(5xy^2)^3】/（9x^2y^6）
[(-2*x^2*y^3)^2*x-2x*(5xy^2)^3]/(9x^2y^6)
=[(4*x^4*y^6)*x-2x*125x^3y^6]/(9x^2y^6)
=(4*x^5*y^6-250*x^4y^6)/(9x^2y^6)
=(4*x^3-250*x^2)/9
=4/9*x^3-250/9*x^2
x(x-y)2-(y-x)3
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