WordPress can render LaTeX since I can remember. Example: - http://l.wordpress.com/latex.php?latex=\displaystyle%20w_{a,u}=\frac{\sum_{i=1}^m(r_{a,i}-\bar{r_a

WordPress can render LaTeX since I can remember. Example: - http://l.wordpress.com/latex.php?latex=\displaystyle%20w_{a,u}=\frac{\sum_{i=1}^m(r_{a,i}-\bar{r_a})\times(r_{u,i}-bar{r_u})}{\sigma_a\times\sigma_u}&bg=ffffff&fg=000000&s=3 http://l.wordpress.com/latex.php?latex=\displaystyle%20w_{a,... - or a simpler one: http://l.wordpress.com/latex.php?latex=\frac{\pi}{2}&bg=ffffff&fg=000000&s=3 http://l.wordpress.com/latex.php?latex=\frac{\pi}{2}&bg=ffff...