Simplify the complex fraction: xy−yx1x−1y\frac{\frac{x}{y} - \frac{y}{x}}{\frac{1}{x} - \frac{1}{y}}x1−y1yx−xy.
−(x+y)-(x+y)−(x+y)
x+yx+yx+y
x+yxy\frac{x+y}{xy}xyx+y
x−yx-yx−y