计算 -4x^2y+3xy^2+x^2y-2xy^2
(x^2+xy/x-y)/(xy/x-y)计算
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
x-y/xy-y^2计算
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算(xy-y^2)÷x-y/xy
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
(xy-x^2)乘以(xy)/(x-y)
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
(-3x^y+2xy)-( )=4x^+xy
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
计算:(3x^2-2y^2)-(-x^2+2xy+y^2)-(x^2-4xy+3y^2)