Evaluate the difference: xx2−1−1x2−x\frac{x}{x^2-1} - \frac{1}{x^2-x}x2−1x−x2−x1.
1x(x+1)\frac{1}{x(x+1)}x(x+1)1
x−1x(x+1)\frac{x-1}{x(x+1)}x(x+1)x−1
1x+1\frac{1}{x+1}x+11
x+1x(x−1)\frac{x+1}{x(x-1)}x(x−1)x+1