x-y/x^2+xy除以xy-x^2/x^2y^2-x^4*1/x-y

(XY-X^2)除以X-Y/XY=? (xy-x^2)除以xy分之x-y （y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy) 代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy 【2x（x平方y-xy平方）+xy（xy（xy-x平方）】除以x平方y [-xy^2(2x+y)-8xy)-x^2y)]除以2xy=计算 [(x+y)^2-(x-y)^2]除以2xy [(x+y)^2-(x-y)^2 ]除以2xy (x/y)^2乘以(xy)^-2除以(x^-1y) xy分之x^2-y^2除以(x-y) x-y/x^2+xy除以xy-x^2/x^2y^2-x^4*1/x-y （xy-x²）除以xy分之x²-2xy+y²乘以x²分之x-y 已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理. x平方-2x除以2y-xy等于多少, 【x的平方-2x】除以2y-xy 已知x-y=3xy,则2x+3xy-2y除以x-2xy-y=? 已知X+Y=2XY,求4X-5XY+4Y 除以X+XY+Y 的值 已知X+Y=2XY,求4X-5XY+4Y 除以X+XY+Y 的值