\[\boxed{\mathbf{9.}}\]
\[\textbf{а)}\ \lim_{x \rightarrow 0}{- x^{5}} = 0\]
\[\textbf{б)}\ \lim_{x \rightarrow 1}x^{4} = 1\]
\[\textbf{в)}\ \lim_{x \rightarrow \frac{\pi}{6}}{\sin\left( x + \frac{\pi}{3} \right)} = 1\]
\[\textbf{г)}\ \lim_{x \rightarrow \frac{\pi}{3}}{\cos\left( x - \frac{\pi}{6} \right)} = \frac{\sqrt{3}}{2}\]