Now let us type in a simple formula in LaTeX. Move back to the body of
the document (The portion of the document between
\begin{document} and
\end{document} is called the body). Type in a few
simple sentences and then on an empty line, type the single word
equation. Escape to normal mode and press
<F5>. (Remember:
<F5> is very useful!) This time, the line will
change to:
\begin{equation}
<+content+>
\label{<+label+>}
\end{equation}<++>
with the cursor on the <+content+>.