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

To solve this issue, I used the array environment inside the equation environment like this:

\begin{equation}
    \begin{array}{r c l}
       first Term&=&Second Term\\
                 &=&Third Term
    \end{array}
\end{equation}