/ 2 \
9*I*n*\1 + tan (I*n*(9*x + 1))/
$$9 i n \left(\tan^{2}{\left(i n \left(9 x + 1\right) \right)} + 1\right)$$
2 / 2 \
-162*I*n *\1 - tanh (n*(1 + 9*x))/*tanh(n*(1 + 9*x))
$$- 162 i n^{2} \left(1 - \tanh^{2}{\left(n \left(9 x + 1\right) \right)}\right) \tanh{\left(n \left(9 x + 1\right) \right)}$$
3 / 2 \ / 2 \
1458*I*n *\1 - tanh (n*(1 + 9*x))/*\-1 + 3*tanh (n*(1 + 9*x))/
$$1458 i n^{3} \left(1 - \tanh^{2}{\left(n \left(9 x + 1\right) \right)}\right) \left(3 \tanh^{2}{\left(n \left(9 x + 1\right) \right)} - 1\right)$$