2
2*x*sech(x) - x *sech(x)*tanh(x)
$$- x^{2} \tanh{\left(x \right)} \operatorname{sech}{\left(x \right)} + 2 x \operatorname{sech}{\left(x \right)}$$
/ 2 / 2 \ \
\2 + x *\-1 + 2*tanh (x)/ - 4*x*tanh(x)/*sech(x)
$$\left(x^{2} \left(2 \tanh^{2}{\left(x \right)} - 1\right) - 4 x \tanh{\left(x \right)} + 2\right) \operatorname{sech}{\left(x \right)}$$
/ / 2 \ 2 / 2 \ \
\-6*tanh(x) + 6*x*\-1 + 2*tanh (x)/ - x *\-5 + 6*tanh (x)/*tanh(x)/*sech(x)
$$\left(- x^{2} \left(6 \tanh^{2}{\left(x \right)} - 5\right) \tanh{\left(x \right)} + 6 x \left(2 \tanh^{2}{\left(x \right)} - 1\right) - 6 \tanh{\left(x \right)}\right) \operatorname{sech}{\left(x \right)}$$