3Y 2XY---- + ---------2X+2Y (X^2)+XY

2x²y-3(2xy-xy)-xy x^2-xy-6y^2+3xy+y+2 2y+3xy因式分解 xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 X^Y-2XY^2+y^3 (3xy-9x2-2y2-6xy)-(6x2+2xy-3xy-y) x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) (-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)] 计算题 xy【y^2+x^2】-y^2【xy+2x】-3xy 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] xy^2=-3,求-xy(x^2y^5-xy^3-y) xy(xy+1)+xy+3-2(x+y+1/2)-(x+y-1)^2因式分解 已知xy^2=-2,求-xy（x^2y^5-xy^3-y)的值. 2x平方y+3x平方Y-2XY平方+2XY+XY是多少啊 已知xy^2=-2 求-xy(x^2y^5-xy^3-y) 3(x^2y+xy)-4(xy-2x^2y)-(-xy)