$$6 x^{2} \sinh{\left (2 x^{3} \right )}$$
/ 3 / 3\ / 3\\
12*x*\3*x *cosh\2*x / + sinh\2*x //
$$12 x \left(3 x^{3} \cosh{\left (2 x^{3} \right )} + \sinh{\left (2 x^{3} \right )}\right)$$
/ 3 / 3\ 6 / 3\ / 3\\
12*\18*x *cosh\2*x / + 18*x *sinh\2*x / + sinh\2*x //
$$12 \left(18 x^{6} \sinh{\left (2 x^{3} \right )} + 18 x^{3} \cosh{\left (2 x^{3} \right )} + \sinh{\left (2 x^{3} \right )}\right)$$