3 _________
-\/ sech(x) *tanh(x)
---------------------
3
$$- \frac{\tanh{\left(x \right)} \sqrt[3]{\operatorname{sech}{\left(x \right)}}}{3}$$
3 _________ / 2 \
\/ sech(x) *\-3 + 4*tanh (x)/
-----------------------------
9
$$\frac{\left(4 \tanh^{2}{\left(x \right)} - 3\right) \sqrt[3]{\operatorname{sech}{\left(x \right)}}}{9}$$
/ 2 \
3 _________ | 28*tanh (x)|
-\/ sech(x) *|-1 + -----------|*tanh(x)
\ 27 /
$$- \left(\frac{28 \tanh^{2}{\left(x \right)}}{27} - 1\right) \tanh{\left(x \right)} \sqrt[3]{\operatorname{sech}{\left(x \right)}}$$