(3x^2y-2xy^2)-(xy^2-2x^2y)-3(x^2y^2+x^2y)+3(x^2y^2=xy^2) 其中x=-1 y=2(3x^2y-2xy^2)-(xy^2-2x^2y)-3(x^2y^2+x^2y)+3(x^2y^2+xy^2) 其中x=-1 y=2

2x²y-3(2xy-xy)-xy 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^2-xy/xy-y^2约分 3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程 计算：3xy(x²y-xy²+xy)-xy²(2x-xy+2x） x^2-xy-6y^2+3xy+y+2 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] (-3xy+2xy)-(4xy+xy) (-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)] 计算题 xy【y^2+x^2】-y^2【xy+2x】-3xy x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) xy(xy+1)+xy+3-2(x+y+1/2)-(x+y-1)^2因式分解 2x平方y+3x平方Y-2XY平方+2XY+XY是多少啊