Prove that : `int 1/(a^(2)-x^(2)) dx = 1/(2a) log |(a+x)/(a-x)|+c.`

Explanation

To prove that

\[ \int \frac{1}{a^2 - x^2} \, dx = \frac{1}{2a} \log \left| \frac{a+x}{a-x} \right| + C, \]

we can follow these steps:

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