g(x)'= \frac{(sh x)^{(ch x)}}{{(ch x) \cdot \ln (ch x)} + {\frac{(sh x) \cdot (sh x)}{(ch x)}}} + \frac{(ch x)^{(sh x)}}{{(sh x) \cdot \ln (sh x)} + {\frac{(ch x) \cdot (ch x)}{(sh x)}}}