$\int x(\tan^2 x) dx =$

  • A
    $x \tan x - \log_e(\sec x) - \frac{x^2}{2} + C$
  • B
    $x \tan x + \log_e(\sec x) - \frac{x^2}{2} + C$
  • C
    $x \tan x - \log_e(\sec x) + \frac{x^2}{2} + C$
  • D
    $x \tan x + \log_e(\sec x) + \frac{x^2}{2} + C$

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