Simplify: x3+x2−x−1x2−1\frac{x^3 + x^2 - x - 1}{x^2 - 1}x2−1x3+x2−x−1 for x≠±1x \neq \pm 1x=±1.
x+1x + 1x+1
x−1x - 1x−1
x2+x+1x^2 + x + 1x2+x+1
x2−x−1x^2 - x - 1x2−x−1