\(\int \frac{e^x-e^{-x}}{e^x+e^{-x}}dx\)

\(\log|e^x-e^{-x}|+c\) \(\log|e^x+e^{-x}|+c\) \(e^x+c\) \(e^{-x}+c\)

\(\log|e^x+e^{-x}|+c\)

Put \(e^x+e^{-x}=t\)