计算:3xy[2xy-x(y-2)+x]
计算:3xy[2xy-x(y-2)+x]
计算3xy[2xy-x(y-2)+x-1]
(x^2+xy/x-y)/(xy/x-y)计算
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)
计算:(-7x²y)(2x²y-3xy³+xy)
1.计算 (-x方+2xy-y方)-2(xy-3x方)+3(2y方-xy)
(2X平方y+3xy平方)-(6x平方-3XY平方)(计算)
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算(xy-y^2)÷x-y/xy
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
x-y/xy-y^2计算