$[-/1$ Points$]$

SCA

Evaluate the integral. $($Use $C$ for the constant of integration.$)$

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{e^u}{(1-e^u{)}^2}du$

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$15.[-/1$ Points$]$

Find an equation of the tangent line to the given curve at

$y=e^x$