Subtract: 3x2−x−1x2−1\frac{3}{x^2-x} - \frac{1}{x^2-1}x2−x3−x2−11
2x+3x(x−1)(x+1)\frac{2x+3}{x(x-1)(x+1)}x(x−1)(x+1)2x+3
2x−3x(x−1)(x+1)\frac{2x-3}{x(x-1)(x+1)}x(x−1)(x+1)2x−3
3−xx(x−1)(x+1)\frac{3-x}{x(x-1)(x+1)}x(x−1)(x+1)3−x
2x2−x−1\frac{2}{x^2-x-1}x2−x−12