$\int \frac{d x}{x^{2}+4 x+13} = $

  • A
    $\frac{1}{3} \tan ^{-1}\left(\frac{x+2}{3}\right)+c$
  • B
    $\frac{1}{6} \log \left(\frac{x-1}{x+5}\right)+c$
  • C
    $\frac{1}{6} \tan ^{-1}\left(\frac{x+2}{3}\right)+c$
  • D
    $3 \tan ^{-1}\left(\frac{x+2}{3}\right)+c$

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