已知xy^2=-2 求-xy(x^2y^5-xy^3-y)

已知xy^2=-2,求-xy（x^2y^5-xy^3-y)的值. 已知xy^2=-2 求-xy(x^2y^5-xy^3-y) 已知x^2-xy=5,xy-y^2=-3求3(x^2-xy)-xy+y^2 已知xy/x+y=3,求代数式2x-5xy+2y/x-3xy+y 已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值 已知X+Y分之XY=2,求-X+3XY-Y分之3X+5XY+3Y 已知xy=2(x+y),求(5x-xy+5y)/(3xy-x-y)的值 已知x-y=2xy,求代数式3x-5xy-3y/x+xy-y的值 已知(x+1)²+|y-1|=0,求2(xy-5xy²)-(3xy²-xy)得值 已知x:y=3:2,求(x²+3xy)/(xy+2xy) 已知xy^2=-2求xy（2x^3y^7+5x^2y 已知y=3xy+x,求代数式2x+5xy-2y/x-2xy-y的值(xy≠0)