\[\boxed{\mathbf{608}\mathbf{.}}\]
\[2)\ 2\ arctg\ 1 + 3\arcsin\left( - \frac{1}{2} \right) =\]
\[= 2 \bullet \frac{\pi}{4} - 3\arcsin\frac{1}{2} = \frac{\pi}{2} - 3 \bullet \frac{\pi}{6} =\]
\[= \frac{\pi}{2} - \frac{\pi}{2} = 0\]
\[= - 5 \bullet \frac{\pi}{3} - 3\pi + 3\frac{\pi}{4} =\]
\[= \frac{- 20\pi - 36\pi + 9\pi}{12} = - \frac{47\pi}{12}\]