Add: 2x+1x2−x+3x2−1\dfrac{2x + 1}{x^2 - x} + \dfrac{3}{x^2 - 1}x2−x2x+1+x2−13.
(2x+1)(x+1)+3xx(x−1)(x+1)\dfrac{(2x+1)(x+1) + 3x}{x(x-1)(x+1)}x(x−1)(x+1)(2x+1)(x+1)+3x
2x2+5x+4x(x−1)(x+1)\dfrac{2x^2 + 5x + 4}{x(x-1)(x+1)}x(x−1)(x+1)2x2+5x+4
2x+4x(x+1)\dfrac{2x + 4}{x(x+1)}x(x+1)2x+4
2x+1x+3x2−1\dfrac{2x+1}{x} + \dfrac{3}{x^2-1}x2x+1+x2−13