计算 (-1/3xy+3/2y^2-x^2)(-6xy^2)^2
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
(x^2+xy/x-y)/(xy/x-y)计算
x^2-xy-6y^2+3xy+y+2
计算:(2分之1x^(2)y-2xy+y^(2))·3xy
(2X平方y+3xy平方)-(6x平方-3XY平方)(计算)
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
xy(xy+1)+(xy+3)-2(x+y+2分之一)-(x+y-1)的平方
(-3分之1xy)的平方×[xy(2x-y)-2x(xy-y的平方)]