已知1x\frac{1}{x}x1+1y\frac{1}{y}y1=5, 3x−4xy+3yx+2xy+y\frac{3x-4xy+3y}{x+2xy+y}x+2xy+y3x−4xy+3y的值为
已知1a\frac{1}{a}a1-1b\frac{1}{b}b1=3, 则a+ab−ba−2ab−b\frac{a+ab-b}{a-2ab-b}a−2ab−ba+ab−b的值等于