% !TeX root = ../script.tex
\documentclass[../../script.tex]{subfiles}

\begin{document}
    \chapter{Ordinary Differential Equations}
    \vspace*{\fill}\par
    \pagebreak  

    \subfile{sections/solution_methods.tex}
    \subfile{sections/picard_lindelof.tex}
    \subfile{sections/linear_odes.tex}
\end{document}