-2*sinh(x)
----------------
2
cosh(x)*cosh (x)
$$- \frac{2 \sinh{\left (x \right )}}{\cosh^{3}{\left (x \right )}}$$
/ 2 \
| 3*sinh (x)|
2*|-1 + ----------|
| 2 |
\ cosh (x) /
-------------------
2
cosh (x)
$$\frac{1}{\cosh^{2}{\left (x \right )}} \left(\frac{6 \sinh^{2}{\left (x \right )}}{\cosh^{2}{\left (x \right )}} - 2\right)$$
/ 2 \
| 3*sinh (x)|
8*|2 - ----------|*sinh(x)
| 2 |
\ cosh (x) /
--------------------------
3
cosh (x)
$$\frac{8 \sinh{\left (x \right )}}{\cosh^{3}{\left (x \right )}} \left(- \frac{3 \sinh^{2}{\left (x \right )}}{\cosh^{2}{\left (x \right )}} + 2\right)$$