\textdegree ->\OT1-cmd \textdegree \OT1\textdegree
\OT1-cmd #1#2->\ifx \protect \@typeset@protect \@inmathwarn #1\expandafter \ifx \csname \cf@encoding \string #1\endcsna
me \relax \expandafter \ifx \csname ?\string #1\endcsname \relax \expandafter \def \csname ?\string #1\endcsname {\Text
SymbolUnavailable #1}\fi \global \expandafter \let \csname \cf@encoding \string #1\expandafter \endcsname \csname ?\str
ing #1\endcsname \fi \csname \cf@encoding \string #1\expandafter \endcsname \else \noexpand #1\fi