# Wrapping lines of an equation with \left and \right parentheses

I am having trouble formatting the following mathematical expression:

\begin{align*}
A  &= \left(\left(\frac{1}{2},\frac{1}{2}\right) + \sqrt{2}Rot_{-\pi/4}\left\langle 0, \frac{1}{2} \right\rangle, \sqrt{2}Rot_{\pi/4}\left\langle 0, \frac{1}{2} \right\rangle \sqrt{2}Rot_{3\pi/4}\left\langle 0, \frac{1}{2} \right\rangle\right)\\
&=  \left(\left(\frac{1}{2},\frac{1}{2}\right)+ \sqrt{2}
\begin{pmatrix} \cos(\pi/4) & \sin(\pi/4) \\
-\sin(\pi/4) & \cos(\pi/4) \end{pmatrix}, \sqrt{2}
\begin{pmatrix} \cos(\pi/4) & -\sin(\pi/4) \\
\sin(\pi/4) & \cos(\pi/4) \end{pmatrix}, \sqrt{2}
\begin{pmatrix} \cos(3\pi/4) & -\sin(3\pi/4) \\
\sin(3\pi/4) & \cos(3\pi/4) \end{pmatrix}
\begin{pmatrix} \cos(3\pi/4) & -\sin(3\pi/4) \\
\sin(3\pi/4) & \cos(3\pi/4) \end{pmatrix}\right)\\
\end{align*}


It gives me the following result:

I would like for the piece that runs off the page to just continue on the next line with a little bit of indentation. I tried to do this with more align symbols, but this fails because whenever I go to break the line, I leave an unmatched \left(.

How can I format this so that the piece of the equation that runs of the page continues onto the next line with a little bit of an indentation?

Thanks for all the help!

Use multline* instead.

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{multline*}
\left(\left(\frac{1}{2},\frac{1}{2}\right)+ \sqrt{2}
\begin{pmatrix} \cos(\pi/4) & \sin(\pi/4) \\
-\sin(\pi/4) & \cos(\pi/4) \end{pmatrix}, \sqrt{2}
\begin{pmatrix} \cos(\pi/4) & -\sin(\pi/4) \\
\sin(\pi/4) & \cos(\pi/4) \end{pmatrix},\right.\\
\left. \qquad  \sqrt{2}                %% remove \qquad if you want
\begin{pmatrix} \cos(3\pi/4) & -\sin(3\pi/4) \\
\sin(3\pi/4) & \cos(3\pi/4) \end{pmatrix}
\begin{pmatrix} \cos(3\pi/4) & -\sin(3\pi/4) \\
\sin(3\pi/4) & \cos(3\pi/4) \end{pmatrix}\right)\\
\end{multline*}
\end{document}


For the updated query and needs, use mathtools (instead of amsmath) and it multlined environment.

\documentclass{article}
\usepackage{mathtools}
\begin{document}
\begin{align*}
A  &= \left(\left(\frac{1}{2},\frac{1}{2}\right) + \sqrt{2}Rot_{-\pi/4}\left\langle 0, \frac{1}{2} \right\rangle, \sqrt{2}Rot_{\pi/4}\left\langle 0, \frac{1}{2} \right\rangle \sqrt{2}Rot_{3\pi/4}\left\langle 0, \frac{1}{2} \right\rangle\right)\\
&=\!\!
\begin{multlined}[t]
\left(\left(\frac{1}{2},\frac{1}{2}\right)+ \sqrt{2}
\begin{pmatrix} \cos(\pi/4) & \sin(\pi/4) \\
-\sin(\pi/4) & \cos(\pi/4) \end{pmatrix}, \sqrt{2}
\begin{pmatrix} \cos(\pi/4) & -\sin(\pi/4) \\
\sin(\pi/4) & \cos(\pi/4) \end{pmatrix},\right.\\[\jot]
\left. \qquad  \sqrt{2}                %% remove \qquad if you want
\begin{pmatrix} \cos(3\pi/4) & -\sin(3\pi/4) \\
\sin(3\pi/4) & \cos(3\pi/4) \end{pmatrix}
\begin{pmatrix} \cos(3\pi/4) & -\sin(3\pi/4) \\
\sin(3\pi/4) & \cos(3\pi/4) \end{pmatrix}\right)\\
\end{multlined}
\end{align*}
\end{document}


• This is actually currently inside an \begin{align*} with other expressions all aligned by an = sign. When I tried multline I got the following error: Extra alignment tab has been changed to \cr. --- TeX said --- <template> ...l \lineht@ \dp \z@ \fi \endtemplate l.574 \end{multline*} – CodeKingPlusPlus Oct 15 '14 at 4:37
• @CodeKingPlusPlus Can you append that to the code in your question? – user11232 Oct 15 '14 at 5:05
• I just updated my question with the LaTeX code and the corresponding output -- Thanks for your help! – CodeKingPlusPlus Oct 15 '14 at 17:32
• @CodeKingPlusPlus See the update. – user11232 Oct 16 '14 at 0:14