/ 2 \
\2 - 2*tanh (x)/*tanh(x)
$$\left(2 - 2 \tanh^{2}{\left(x \right)}\right) \tanh{\left(x \right)}$$
/ 2 \ / 2 \
2*\-1 + tanh (x)/*\-1 + 3*tanh (x)/
$$2 \left(\tanh^{2}{\left(x \right)} - 1\right) \left(3 \tanh^{2}{\left(x \right)} - 1\right)$$
/ 2 \ / 2 \
-8*\-1 + tanh (x)/*\-2 + 3*tanh (x)/*tanh(x)
$$- 8 \left(\tanh^{2}{\left(x \right)} - 1\right) \left(3 \tanh^{2}{\left(x \right)} - 2\right) \tanh{\left(x \right)}$$