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