$$ 137. \,\int\!\! \sinh x dx = \cosh x +C $$

$$ 138. \,\int\!\! \cosh x dx = \sinh x +C $$

$$ 139. \,\int\!\! th x dx =\ln \cosh x +C $$

$$ 140. \,\int\!\! \sinh ^2 x dx = -\frac{x}{2} + \frac{1}{4} \sinh 2x +C $$

$$ 141. \,\int\!\! \cosh^2 x dx = \frac{x}{2}+\frac{1}{4} \sinh 2x +C $$