LaTeX Editor

Preview would render here with a LaTeX rendering library like MathJax or KaTeX.

\documentclass{article}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}

\section{Introduction to LaTeX}
LaTeX is a document preparation system for high-quality typesetting. It is most often used for medium-to-large technical or scientific documents but it can be used for almost any form of publishing.

\section{Mathematical Expressions}
LaTeX is especially useful for mathematical notation. Here are some examples:

\subsection{Equations}
The quadratic formula is $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

\subsection{Matrices}
$$
A = \begin{pmatrix}
a_{11} & a_{12} & a_{13} \\
a_{21} & a_{22} & a_{23} \\
a_{31} & a_{32} & a_{33}
\end{pmatrix}
$$

\subsection{Integrals}
$$\int_{a}^{b} f(x) \, dx = F(b) - F(a)$$

\end{document}