\documentclass{article}
\usepackage{amsmath}
\usepackage{graphicx}

\title{Sample Paper}
\author{Dr. Smith}

\begin{document}
\maketitle

\section{Introduction}

This is the first paragraph of the introduction.
It has multiple sentences that span across lines.
See Fig. 3 for the experimental setup.

The second paragraph discusses methods.
Previous work by et al. showed promising results.
We extend these findings in several ways.

\begin{equation}
E = mc^2
\end{equation}

After the equation, we continue discussing.
The energy-mass equivalence is fundamental.

% This is a comment
\section{Results}

The results demonstrate clear improvement.
We observe a 15% increase in performance vs. the baseline.
Table 1 summarizes the findings.

\end{document}
