3x^2y-[2xy-2(xy-2/3x^2y)+xy],其中x=3,y=-3/1.等于

2x²y-3(2xy-xy)-xy 3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程 计算：3xy(x²y-xy²+xy)-xy²(2x-xy+2x） 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 计算：3xy[2xy-x（y-2）+x] 计算3xy[2xy-x(y-2)+x-1] （-3x^y+2xy)-( )=4x^+xy 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] x^2-xy-6y^2+3xy+y+2 3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x) (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 因式分解：(2x-y)(x^2+xy-2y^2) xy(x^2-xy)(-3xy^2) 化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]} 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 由已知x+y=-2,xy=3那么2(x+xy)-[(xy-3y)-x]-(-xy)等于多少? x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)