Simplify the complex rational expression: 1x+1y1xy\frac{\frac{1}{x} + \frac{1}{y}}{\frac{1}{xy}}xy1x1+y1
x+yx + yx+y
xyxyxy
1x+y\frac{1}{x+y}x+y1
x+yxy\frac{x+y}{xy}xyx+y