\expandafter\ifx\csname doTocEntry\endcsname\relax \expandafter\endinput\fi 
\doTocEntry\tocsection{1}{\csname a:TocLink\endcsname{1}{x1-10001}{QQ2-1-1}{Background Theory}}{1}\relax 
\doTocEntry\toclikesubsection{}{\csname a:TocLink\endcsname{1}{x1-2000}{QQ2-1-2}{Damped Oscillations}}{1}\relax 
\doTocEntry\toclikesubsection{}{\csname a:TocLink\endcsname{1}{x1-3000}{QQ2-1-3}{Driven Oscillations}}{3}\relax 
\doTocEntry\toclikesection{}{\csname a:TocLink\endcsname{1}{x1-4000}{QQ2-1-4}{Conclusion}}{5}\relax 
\par