When searching on a site with MathJax enabled (example), I saw some LaTeX rendering issues: (and currently it's also in the questions list on the site)
Even though the LaTeX rendering is fine when opening the question:
The LaTeX code is:
$f(n) =
\begin{cases}
0, & \text{$ \omega<0, \omega=1, \omega>3 $} \\[2ex]
-\omega + 1, & \text{$ 0\le\omega<1 $} \\[2ex]
\omega^2 - 1, & \text{$ 1< \omega \le 2 $} \\[2ex]
3 \omega, & \text{$2 < \omega \le 3 $}
\end{cases}$
