化简:x²+xy/x÷xy+y²/2xy

x-y/x²÷x²-2xy+y²/xy*（xy-x²） 计算：(xy-x²)×x-y/xy 化简：[(x+y)²-(x-y)²]÷2xy 2x(x²y-xy²)+xy(xy-x²)]÷x²y等于多少 计算；（xy-x²）÷x²-2xy+y²/xy · x-y/x² 化简2XY+(X-Y)² 1.化简：x²-4y²/x²+y²+2xy÷2y+x/x²+xy. 计算：x²+2xy+y²/xy-y².x²-2xy+y²/xy+y&# x²/xy-x/y 化简4xy-3y²-3x²+xy-3xy-2x²+x²-2y² X²+2xy+y²/xy乘x²-2xy+y²/xy+y²= 因式分解xy²-2xy+x+2y-1