答案1
这是使用堆栈的一种方法。
\documentclass{article}
\usepackage{amsmath,stackengine}
\begin{document}
\[
\renewcommand\stackalignment{l}
\left\{
w \in \{0,1\}^* \,\middle|\,
\stackanchor{there is a way to insert the substring 011 (once) into $w$}
{so that the result is a multiple of 3 in binary}
\right\}
\]
\end{document}