$\int {{e^{ - x}}{{\csc }^2}(2{e^{ - x}} + 5)} \,dx = $

  • A
    $\frac{1}{2}\cot (2{e^{ - x}} + 5) + c$
  • B
    $ - \frac{1}{2}\cot (2{e^{ - x}} + 5) + c$
  • C
    $2\cot (2{e^{ - x}} + 5) + c$
  • D
    $ - 2\cot (2{e^{ - x}} + 5) + c$

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