[ equation]$\ldots$[/equation]
[ equation]$\perp$[/equation]
[ equation]$\parallel$[/equation]
[ equation]$\equiv$[/equation]
[ equation]$\neq$[/equation]
[ equation]$\subset$[/equation]
[ equation]$\supset$[/equation]
[ equation]$\prod$[/equation]
[ equation]$\widehat{ABC}\equiv\widehat{MNP}$[/equation]
[ equation]$\overrightarrow{a}$[/equation]
[ equation]$\in$[/equation]
[ equation]$\leq$[/equation]
[ equation]$\geq$[/equation]
[ equation]$\Leftarrow\ \Rightarrow\ \Leftrightarrow$[/equation]
[ equation]$\{;\}$[/equation]
Spatiu liber intre litere sau numere:
[ equation]$x\ y; xy$[/equation]