$\int \frac{2x \tan^{-1}(x^2)}{1 + x^4} \, dx = $

  • A
    $(\tan^{-1}(x^2))^2 + c$
  • B
    $\frac{1}{2} (\tan^{-1}(x^2))^2 + c$
  • C
    $2 (\tan^{-1}(x^2))^2 + c$
  • D
    इनमें से कोई नहीं

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