-3*sinh(x)
----------------
3
cosh(x)*cosh (x)
$$- \frac{3 \sinh{\left (x \right )}}{\cosh^{4}{\left (x \right )}}$$
/ 2 \
| 4*sinh (x)|
3*|-1 + ----------|
| 2 |
\ cosh (x) /
-------------------
3
cosh (x)
$$\frac{1}{\cosh^{3}{\left (x \right )}} \left(\frac{12 \sinh^{2}{\left (x \right )}}{\cosh^{2}{\left (x \right )}} - 3\right)$$
/ 2 \
| 20*sinh (x)|
3*|11 - -----------|*sinh(x)
| 2 |
\ cosh (x) /
----------------------------
4
cosh (x)
$$\frac{3 \sinh{\left (x \right )}}{\cosh^{4}{\left (x \right )}} \left(- \frac{20 \sinh^{2}{\left (x \right )}}{\cosh^{2}{\left (x \right )}} + 11\right)$$