\[\boxed{\mathbf{168}.}\]
\[1)\ y = \left\{ \begin{matrix} x;\ \ \ \ x < 0 \\ x^{3};\ \ x \geq 0 \\ \end{matrix} \right.\ \]
\[2)\ y = \left\{ \begin{matrix} - x;\ \ \ x < 0 \\ \sqrt{x};\ \ \ x \geq 0 \\ \end{matrix} \right.\ \]