/ / 2 \ \
| 2 | cosh (x)| |
| x *|1 - --------|*cosh(x)|
| / 2 \ | 2 | |
| | cosh (x)| 3*cosh(x) \ sinh (x)/ |
2*|3*x*|1 - --------| + --------- - -------------------------|
| | 2 | sinh(x) sinh(x) |
\ \ sinh (x)/ /
$$2 \left(- \frac{x^{2} \left(1 - \frac{\cosh^{2}{\left(x \right)}}{\sinh^{2}{\left(x \right)}}\right) \cosh{\left(x \right)}}{\sinh{\left(x \right)}} + 3 x \left(1 - \frac{\cosh^{2}{\left(x \right)}}{\sinh^{2}{\left(x \right)}}\right) + \frac{3 \cosh{\left(x \right)}}{\sinh{\left(x \right)}}\right)$$