\[\frac{5x + 10}{x - 1} \cdot \frac{x^{2} - 1}{x^{2} - 4} =\]
\[= \frac{5(x + 2)(x - 1)(x + 1)}{(x - 1)(x - 2)(x + 2)} =\]
\[= \frac{5x + 5}{x - 2}.\]