[most frequently used]
\pi
\frac {\empty }{\empty }[6_01.gif]
\root {}{\empty }[6_04.gif]
\empty ^{\empty }[5_01.gif]
\bracem{()}{\empty}[10_02.gif]#\se{\bracem{()}{\empty\,;\:\empty}}
\bracem{(]}{\empty}[10_03.gif]#\se{\bracem{(]}{\empty\,;\:\empty}}
\bracem{[)}{\empty}[10_04.gif]#\se{\bracem{[)}{\empty\,;\:\empty}}
\bracem{[]}{\empty}[10_05.gif]#\se{\bracem{[]}{\empty\,;\:\empty}}
\bracem{\{\}}{\empty}[10_06.gif]#\se{\bracem{\{\}}{\empty}}
\emptyset#noSolution
