[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
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[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(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y[x(x
[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(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
[x(x^2y^2-xy)-y(x^2-x^3y)]/(3x^2y)
={x[xy(xy-1)]-y[x²(1-xy)]}/(3x²y)
=[x²y(xy-1)-yx²(1-xy)]/(3x²y)
=[x²y(xy-1)+yx²(xy-1)]/(3x²y)
=[x²y(xy-1)+x²y(xy-1)]/(3x²y)
=[2x²y(xy-1)]/(3x²y)
=[2(xy-1)]/3
(-x-y)(x^2+xy+y^2)
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
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因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
(x-y)[(x+y)^2-xy]+(x-y)[(x-y)^2+xy]
x根号x+x根号y/xy-y^2)-（x+根号xy+y/x根号x-y根号）y
.(x+y-2)(x+y-2xy)+(xy-1)^2
(x^2-xy)y÷y-x/xy怎么做?
[x(x^2y^2-xy)-y(x^2-x^3y)]/(2x^2y)
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
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(x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1)