3 2 / 2 \
2 tanh (x) x*tanh (x)*\3 - 3*tanh (x)/
1 - tanh (x) - -------- - ---------------------------
3 3
$$- \frac{x \left(3 - 3 \tanh^{2}{\left(x \right)}\right) \tanh^{2}{\left(x \right)}}{3} - \frac{\tanh^{3}{\left(x \right)}}{3} - \tanh^{2}{\left(x \right)} + 1$$
/ 2 \ / 2 / 2 \ \
2*\-1 + tanh (x)/*\1 - x*tanh (x) - x*\-1 + tanh (x)/ + tanh(x)/*tanh(x)
$$2 \left(\tanh^{2}{\left(x \right)} - 1\right) \left(- x \left(\tanh^{2}{\left(x \right)} - 1\right) - x \tanh^{2}{\left(x \right)} + \tanh{\left(x \right)} + 1\right) \tanh{\left(x \right)}$$
/ 2 \
/ 2 \ | 2 3 / 2 \ / 2 \ 4 2 / 2 \|
2*\-1 + tanh (x)/*\1 - 3*tanh (x) - 3*tanh (x) + x*\-1 + tanh (x)/ - 3*\-1 + tanh (x)/*tanh(x) + 2*x*tanh (x) + 7*x*tanh (x)*\-1 + tanh (x)//
$$2 \left(\tanh^{2}{\left(x \right)} - 1\right) \left(x \left(\tanh^{2}{\left(x \right)} - 1\right)^{2} + 7 x \left(\tanh^{2}{\left(x \right)} - 1\right) \tanh^{2}{\left(x \right)} + 2 x \tanh^{4}{\left(x \right)} - 3 \left(\tanh^{2}{\left(x \right)} - 1\right) \tanh{\left(x \right)} - 3 \tanh^{3}{\left(x \right)} - 3 \tanh^{2}{\left(x \right)} + 1\right)$$