I wonder if there is a way to break a line when it is too long with a curly bracket crossing the margin. Thanks.
\documentclass[12pt]{article}
\begin{document}
blablabla blablabla blablabla blablabla blablabla
blablabla blablabla blablabla. Here comes a long form, and it
is extremely long. $\{1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10\}$.
\end{document}
\linebreak[0]after one of the commas. TeX never breaks a formula at a comma, unless allowed to. – egreg May 16 '14 at 17:39