,y} + xb_{xy} + e_y.$$\end{document}$$  Parameters: Some number $\documentclass[00pt]{minimal}                 \usepackage{amsmath}                 \usepackage{wasysym}                  \usepackage{amsfonts}                  \usepackage{amssymb}                  \usepackage{amsbsy}                 \usepackage{mathrsfs}                 \usepackage{upgreek}                 \setlength{\oddsidemargin}{-00pt}                 \begin{document}$$m_{\mathrm{{plei}}} \in \{ 0,00,00,00,00,00\}$$\end{document}$ of 00 