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Maybe Simplify First?

Calculus Level 1

Evaluate the indefinite integral below.

\[\large \int \frac{dx}{1 + e^{-x}}\]

\(\ln(e^{-x} - 1)\) + C \(\ln(e^x - 1)\) + C \(\ln(e^x + 1)\) + C \(\ln(e^{-x} + 1)\) + C

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by Andrew Ellinor

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