Problem
\( \frac{\frac{a^{2}-b^{2}}{a^{2}-25}}{\frac{b-a}{a+5}} \)
Solution
Step 1 ：\( = \frac{a^{2}-b^{2}}{a^{2}-25} \cdot \frac{a+5}{b-a} \)
Step 2 ：\( = \frac{(a+b)(a-b)}{a^{2}-25} \cdot \frac{a+5}{-(a-b)} \)
Step 3 ：\( = -\frac{(a+b)}{a-5} \)
