4x^2-(4x^2-4xy+y^2)(因式分解）

因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) (x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) (x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1) (x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] （-3x^y+2xy)-( )=4x^+xy 2x(x-y)+4xy(y-x) 因式分解2x(x-y)+4xy(y-x) 因式分解 计算:2xy/(x+y)².(x+y)/4y 计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2 化简2(x²y+xy)-3(x²y-xy)-4x²y xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 x-y/x^2+xy除以xy-x^2/x^2y^2-x^4*1/x-y （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 3(x^2y+xy)-4(xy-2x^2y)-(-xy) 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) 当x-y=2xy时,求4x-3xy-4y/xy