3x/2x+2y + 2xy/x^2+xy

(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 计算：1-2x+x^2/x-x^3*xy+x^2y/x-x^2 （x^2+xy/x-y)/（xy/x-y)计算 -xy^2(x+y)^3+x(x+y)^2因式分解 (x+3y)/(x^2+xy)-x+y计算题 [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 (x+y)/x /(x-(2xy-y^2)/x) 因式分解 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) (x^3-2x^2+xy^2)/(x-y)+(x+y)(y-x)=? 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) x^3-2x^2y+xy^2-x因式分解 (x^2-x-3)(x^2-x-5)-3x^3-2x^2y+xy^2-x