（x^2+y^2)^2-4xy(x^2+y^2)+4x^2y^2 1/2a^3x^2-2a^2xy+2ay^2 因式分解（x^2+y^2)^2-4xy(x^2+y^2)+4x^2y^21/2a^3x^2-2a^2xy+2ay^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^2+xy/x-y)/（xy/x-y)计算 (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 (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) 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 x^2-xy/xy-y^2约分 化简2(x²y+xy)-3(x²y-xy)-4x²y x-y/x^2+xy除以xy-x^2/x^2y^2-x^4*1/x-y xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2