2x(x²y-xy²)+xy(xy-x²)]÷x²y等于多少
2x(x²y-xy²)+xy(xy-x²)]÷x²y等于多少
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
计算:(xy-x²)×x-y/xy
3xy+xy+2x²y+yx²+3x²y等于多少
3y/2x+2y + 2xy/x²+xy等于多少过程
x²/xy-x/y
[-xy/(x-y)²]²×(y²-xy/x)³
x/xy-y²与y/x²-xy 通分
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
化简:[(x+y)²-(x-y)²]÷2xy
X²+2xy+y²/xy乘x²-2xy+y²/xy+y²=