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\int \frac{5 e^{2 x}}{1 + e^{4 x}} d x = ?

\frac{2}{5} \tan (e^{- 2 x})

\frac{5}{2} \tan (e^{2 x})

\frac{5}{2} \tan^{- 1} (e^{2 x})

\frac{5}{2} \tan^{- 1} (e^{- 2 x})

ANS : 3

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