1、(-4xy^3)(-xy)+2y^2(3xy)^2
先化简,再求值 ⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1
3xy-3xy-xy+2yx
5x^2y/-1/2xy*3xy^2
y^3+xy^2+2xy+x^2-1 因式分解
计算3xy[2xy-x(y-2)+x-1]
(-3x^y+2xy)-( )=4x^+xy
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
已知x-y=4xy,则2x+3xy-2yx-2xy-y
xy(xy+1)+(xy+3)-2(x+y+2分之一)-(x+y-1)的平方
当x=3,y=3分之1时,求代数出3xy-[2xy-2(xy-2分之3xy)+xy]+3xy的值
(-3分之1xy)的平方×[xy(2x-y)-2x(xy-y的平方)]
5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简