计算:12xy^2/(x+y) * (x^2 - y^2)/4xy
(x^2+xy/x-y)/(xy/x-y)计算
x-y/xy-y^2计算
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
计算(xy-y^2)÷x-y/xy
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
(xy-x^2)乘以(xy)/(x-y)
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:(x+y/x-y)÷(xy+x^2)
计算:y/(x的平方-xy)+2/(y-x)-x/(y的平方-xy)
计算x²y³-2x(4xy³)