Simplify: 2x2−4−1x−2\frac{2}{x^2-4} - \frac{1}{x-2}x2−42−x−21 (assume x≠±2x \neq \pm 2x=±2).
−1x+2\frac{-1}{x+2}x+2−1
1x+2\frac{1}{x+2}x+21
3x2−4\frac{3}{x^2-4}x2−43
−x−4x2−4\frac{-x-4}{x^2-4}x2−4−x−4