$\int \left( \frac{(x^2+2) a^{(x+\tan^{-1} x)}}{x^2+1} \right) dx = $ . . . . . .

  • A
    $\log a \cdot a^{x+\tan^{-1} x}+c$
  • B
    $\frac{(x+\tan^{-1} x)}{\log a}+c$
  • C
    $\frac{a^{x+\tan^{-1} x}}{\log a}+c$
  • D
    $\log a \cdot (x+\tan^{-1} x)+c$

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