int (((x^2+2)a^((x+tan^-1 x)))/(x^2+1)) ...

`int (((x^2+2)a^((x+tan^-1 x)))/(x^2+1)) dx` =

A

(A) `log a. a^(x+tan^-1 x)+c`

B

(B) `((x+tan^-1 x))/(log a)+c`

C

(C) `( a^(x+tan^-1 x))/(loga)+c`

D

(D) `log a.(x + tan^-1x) +c`

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