\(\rm \int\frac{e^{tan^{-1}x}}{1+x^2}dx=?\)

1
\(\rm e^{\tan^{-1}x}+c\)
2
etan x + c
3
\(\rm e^{-\tan^{-1}x}+c\)
4
\(\rm e^{-\tan^{-1}x}\)

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