\:CheckOption{no_^}
\if:Option \else \:CheckOption{no_}\fi
\if:Option \else
\Configure{SUB}
{\HCode{<sub>}}{\HCode{</sub>}}
\fi
\:CheckOption{no_^}
\if:Option \else \:CheckOption{no^}\fi
\if:Option \else
\Configure{SUP}
{\HCode{<sup>}}{\HCode{</sup>}}
\fi
\:CheckOption{no_^}
\if:Option \else \:CheckOption{no_}\fi
\if:Option \else \:CheckOption{no^}\fi
\if:Option \else
\Configure{SUBSUP}
{\HCode{<sub>}}{\HCode{</sub><sup>}}{\HCode{</sup>}}
\fi
\Configure{left}
{\Picture+{ \a:@Picture{left}}}
{\aftergroup\EndPicture }
\Configure{mathchoice}{\PictureOff}{\PictureOn}
-_-_-