\documentclass{article}
\usepackage{amsmath}
\usepackage{booktabs}
\usepackage{graphicx}
\usepackage{physics}
\begin{document}
\section{Browser LuaLaTeX feasibility}
The browser live-draft probe must preserve ordinary text and font records.
\[
  E = mc^2 + \int_0^1 x^2\,dx
\]
\begin{table}[h]
\centering
\begin{tabular}{lr}
\toprule
Item & Value \\
\midrule
Alpha & 1 \\
Beta & 2 \\
\bottomrule
\end{tabular}
\caption{A rule-bearing table for layout extraction.}
\end{table}

\begin{figure}[h]
\centering
\includegraphics[width=8mm]{pixel.png}
\caption{A tiny image exercises LuaTeX image/whatsit layout nodes.}
\end{figure}

\noindent\rule{0.8\linewidth}{1pt}

\newpage
\section{Second page}
A second physical page proves that shipout records are emitted repeatedly.
The remote-package resolver is exercised by \texttt{physics}; for example,
$\qty{x}=1$.

\newpage
\section{Third page}
Final glyphs ensure that the recorder remains active across multiple shipouts.
\end{document}