$\int x^{2020}(\tan^{-1} x + \cot^{-1} x) dx =$

  • A
    $\frac{x^{2021}}{2020}(\tan^{-1} x + \cot^{-1} x) + C$
  • B
    $\frac{x^{2021}}{2021}(\tan^{-1} x + \cot^{-1} x) + C$
  • C
    $\frac{\pi x^{2021}}{2021} + \frac{\pi}{2} + C$
  • D
    $\frac{x^{52}}{52} + \frac{\pi}{2} + C$

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