0$$\end{document}$$$\documentclass[00pt]{minimal}                 \usepackage{amsmath}                 \usepackage{wasysym}                  \usepackage{amsfonts}                  \usepackage{amssymb}                  \usepackage{amsbsy}                 \usepackage{mathrsfs}                 \usepackage{upgreek}                 \setlength{\oddsidemargin}{-00pt}                 \begin{document}$$\begin{aligned}&\int _\varOmega (u^m_h)^0 \, \rho ^m\, |\nabla \phi ^{m}|+ \tau _m \int _\varOmega |\nabla u^m_h|^0 \, \rho ^m\, |\nabla \phi ^{m}|\\&\quad \le (0+ C \tau _m) \int _\varOmega (u^{m-0}_h)^0 \, \rho ^{m-0}\, | \nabla \phi ^{m-0}|+ C \tau _m \int _\varOmega (f^{e,m})^0 \, \rho ^m \, |\nabla \phi ^{m}|, \end{aligned}$$\end{document}$$from which we obtain 