How can I have linebreaks in my long LaTeX equations?

Question

My equation is very long. How do I get it to continue on the next line rather than go off the page?

Answer 1

SIMPLE ANSWER HERE

\begin{equation}
\begin{split}

equation \\
here

\end{split}
\end{equation}

Answer 2

I used the \begin{matrix}

\begin{equation}
\begin{matrix}
    line_1 \\ 
    line_2 \\ 
    line_3
\end{matrix}
\end{equation}

Answer 3

Use eqnarray and \nonumber

example:

\begin{eqnarray}
    sample = R(s,\pi(s),s') + \gamma V^{\pi} (s') \nonumber \\
    \label{eq:temporal-difference}
     V^{\pi}_{k+1}(s) = (1-\alpha)V^{\pi}(s) - \alpha[sample]
\end{eqnarray}

Answer 4

If your equation does not fit on a single line, then the multline environment probably is what you need:

\begin{multline}
    first part of the equation \\
    = second part of the equation
\end{multline}

If you also need some alignment respect to the first part, you can use split:

\begin{equation}
    \begin{split}
        first part &= second part #1 \\
        &= second part #2
    \end{split}
\end{equation}

Both environments require the amsmath package.

See also aligned as pointed out in an answer below.

Answer 5

Not yet mentioned here, another choice is environment aligned, again from package amsmath:

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{equation}
  \begin{aligned}
    A & = B + C\\
      & = D + E + F\\
      & = G
  \end{aligned}
\end{equation}

\end{document}

This outputs: