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
eqnarray. Escape to normal mode and press
<F5>. (Remember:
<F5> is very useful!) This time, the line will
change to:
\begin{eqnarray}
\label{}<++>
\end{eqnarray}<++>
with the cursor between the {}. Enter a label. We
will use eqn:euler. After typing in
eqn:euler, press <C-j>. This
will take you outside the curly-braces. Another time you used a
Placeholder!