2 2
2*cosh (x) + 2*sinh (x)
$$2 \sinh^{2}{\left(x \right)} + 2 \cosh^{2}{\left(x \right)}$$
$$8 \sinh{\left(x \right)} \cosh{\left(x \right)}$$
/ 2 2 \
8*\cosh (x) + sinh (x)/
$$8 \left(\sinh^{2}{\left(x \right)} + \cosh^{2}{\left(x \right)}\right)$$