\section{Second-Order Nonhomogeneous} \label{ch:second_order_nonhomogeneous} \subsection{General Solution Structure} \label{sec:ch05_general_solution} % Content goes here \subsection{Undetermined Coefficients} \label{sec:ch05_undetermined_coefficients} % Content goes here \subsection{Variation of Parameters} \label{sec:ch05_variation_of_parameters} % Content goes here \subsection{Method Comparison} \label{sec:ch05_method_comparison} % Content goes here \subsection{Summary} \label{sec:ch05_summary} % Summary table at end of chapter \begin{table}[htbp] \centering \caption{Chapter Summary} \label{tab:ch05_summary} \begin{tabular}{l l} \toprule \textbf{Concept} & \textbf{Key Formula/Method} \\ \midrule TBD & TBD \\ \bottomrule \end{tabular} \end{table}