_________
-\/ sech(x) *tanh(x)
---------------------
2
$$- \frac{\tanh{\left(x \right)} \sqrt{\operatorname{sech}{\left(x \right)}}}{2}$$
_________ / 2 \
\/ sech(x) *\-2 + 3*tanh (x)/
-----------------------------
4
$$\frac{\left(3 \tanh^{2}{\left(x \right)} - 2\right) \sqrt{\operatorname{sech}{\left(x \right)}}}{4}$$
_________ / 2 \
-\/ sech(x) *\-14 + 15*tanh (x)/*tanh(x)
-----------------------------------------
8
$$- \frac{\left(15 \tanh^{2}{\left(x \right)} - 14\right) \tanh{\left(x \right)} \sqrt{\operatorname{sech}{\left(x \right)}}}{8}$$