 |\nabla \phi ^{m}|. \end{aligned}$$\end{document}$$Inserting the above estimates into ([00](#Equ00){ref-type=""}) we find$$\documentclass[00pt]{minimal}                 \usepackage{amsmath}                 \usepackage{wasysym}                  \usepackage{amsfonts}                  \usepackage{amssymb}                  \usepackage{amsbsy}                 \usepackage{mathrsfs}                 \usepackage{upgreek}                 \setlength{\oddsidemargin}{-00pt}                 \begin{document}$$\begin{aligned}&\frac{0}{0}\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}|+ \tau _m^0 \int _\varOmega I^m_h \tilde{\rho }^m | \nabla u^m_h|^0 \nonumber \\&\q