[x(x²y²-xy)-y(x²-x³y)]÷3x²y,要过程,急,请各位帮帮忙

[x(x²y²-xy)-y(x²-x³y)]÷3x²y,要过程,急,请各位帮帮忙
[x(x²y²-xy)-y(x²-x³y)]÷3x²y,要过程,急,请各位帮帮忙

[x(x²y²-xy)-y(x²-x³y)]÷3x²y,要过程,急,请各位帮帮忙
原式=(x³y²-x²y-x²y+x³y²)÷3x²y
=(2x³y²-2x²y)÷3x²y
=2x²y(xy-1)÷3x²y
=2/3（xy-1）
=2/3xy-2/3

原式=（x^3y^2-x^2y-x^2y+x^3y^2)÷3x^2y
=(2x^3-2x^2y))÷3x^2y
=2x^2y(xy-1))÷3x^2y
==2/3（xy-1）