$\int \frac{e^{\tan^{-1} x}}{1 + x^2} dx = $

  • A
    $\log(1 + x^2) + c$
  • B
    $\log e^{\tan^{-1} x} + c$
  • C
    $e^{\tan^{-1} x} + c$
  • D
    $\tan^{-1} e^{\tan^{-1} x} + c$

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