समाकलन $\int_{-\pi/4}^{\pi/4} \left( \frac{32 \cos^4 x}{1 + e^{\sin x}} \right) dx$ का मान है:

  • A
    $4\pi + 2$
  • B
    $3\pi + 8$
  • C
    $3\pi + 4$
  • D
    $4\pi + 3$

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