$$2 \sinh{\left(x \right)} \cosh^{3}{\left(x \right)}$$
2 / 2 2 \
2*cosh (x)*\cosh (x) + 3*sinh (x)/
$$2 \left(3 \sinh^{2}{\left(x \right)} + \cosh^{2}{\left(x \right)}\right) \cosh^{2}{\left(x \right)}$$
/ 2 2 \
4*\3*sinh (x) + 5*cosh (x)/*cosh(x)*sinh(x)
$$4 \left(3 \sinh^{2}{\left(x \right)} + 5 \cosh^{2}{\left(x \right)}\right) \sinh{\left(x \right)} \cosh{\left(x \right)}$$