The first derivative
[src]
$$2 \sinh{\left(x \right)} \cosh{\left(x \right)}$$
The second derivative
[src]
/ 2 2 \
2*\cosh (x) + sinh (x)/
$$2 \left(\sinh^{2}{\left(x \right)} + \cosh^{2}{\left(x \right)}\right)$$
The third derivative
[src]
$$8 \sinh{\left(x \right)} \cosh{\left(x \right)}$$