LaTeX.org

2 days ago I installed Latex and I ve been reading how to use it.
This is my document:

\documentclass{article}


\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\author{JCPK}
\title{Electro magnetismo}
\begin{document}

$$\vec E = \int dE = \frac{1}{4\pi\epsilon_0}\int \frac{dq}{r² ...