计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y

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计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/

计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y

计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
=(x^3y^2-x^2y-x^2y+x^3y^2)/3x^2y
=(2x^3y^2-2x^2y)/3x^2y
=2/3xy-2/3