$2 \cosh (x+y) \sinh (x-y) + \sinh 2y =$

  • A
    $\sinh 2x$
  • B
    $\frac{\sinh 2x + \sinh 2y}{2}$
  • C
    $\frac{\sinh 2x - \sinh 2y}{2}$
  • D
    $\cosh 2x$

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