2 2
z *sinh(z) + 2*z*cosh(z) z *(-2 - 2*z)*cosh(z)
------------------------ + ---------------------
2 4
(z + 1) (z + 1)
$$\frac{z^{2} \left(- 2 z - 2\right) \cosh{\left(z \right)}}{\left(z + 1\right)^{4}} + \frac{z^{2} \sinh{\left(z \right)} + 2 z \cosh{\left(z \right)}}{\left(z + 1\right)^{2}}$$
2
2 4*z*(2*cosh(z) + z*sinh(z)) 6*z *cosh(z)
2*cosh(z) + z *cosh(z) + 4*z*sinh(z) - --------------------------- + ------------
1 + z 2
(1 + z)
---------------------------------------------------------------------------------
2
(1 + z)
$$\frac{z^{2} \cosh{\left(z \right)} + \frac{6 z^{2} \cosh{\left(z \right)}}{\left(z + 1\right)^{2}} + 4 z \sinh{\left(z \right)} - \frac{4 z \left(z \sinh{\left(z \right)} + 2 \cosh{\left(z \right)}\right)}{z + 1} + 2 \cosh{\left(z \right)}}{\left(z + 1\right)^{2}}$$
/ 2 \ 2
2 6*\2*cosh(z) + z *cosh(z) + 4*z*sinh(z)/ 24*z *cosh(z) 18*z*(2*cosh(z) + z*sinh(z))
6*sinh(z) + z *sinh(z) - ---------------------------------------- + 6*z*cosh(z) - ------------- + ----------------------------
1 + z 3 2
(1 + z) (1 + z)
------------------------------------------------------------------------------------------------------------------------------
2
(1 + z)
$$\frac{z^{2} \sinh{\left(z \right)} - \frac{24 z^{2} \cosh{\left(z \right)}}{\left(z + 1\right)^{3}} + 6 z \cosh{\left(z \right)} + \frac{18 z \left(z \sinh{\left(z \right)} + 2 \cosh{\left(z \right)}\right)}{\left(z + 1\right)^{2}} + 6 \sinh{\left(z \right)} - \frac{6 \left(z^{2} \cosh{\left(z \right)} + 4 z \sinh{\left(z \right)} + 2 \cosh{\left(z \right)}\right)}{z + 1}}{\left(z + 1\right)^{2}}$$