 by $\documentclass[00pt]{minimal}                 \usepackage{amsmath}                 \usepackage{wasysym}                  \usepackage{amsfonts}                  \usepackage{amssymb}                  \usepackage{amsbsy}                 \usepackage{mathrsfs}                 \usepackage{upgreek}                 \setlength{\oddsidemargin}{-00pt}                 \begin{document}$$\epsilon $$\end{document}$ and recalling ([00](#Equ00){ref-type=""}) we derive$$\documentclass[00pt]{minimal}                 \usepackage{amsmath}                 \usepackage{wasysym}                  \usepackage{amsfonts}                  \usepackage{amssymb}                  \usepackage{amsbsy}                 \usepackage{mathrsfs}                 \usepackage{upgreek}                 \setlength{\oddsidemargin}{-00pt}                 \begin{document}$$\begin{aligned}&\frac{0}{\varepsilon }\int _\varOmega (e^l_h)^0 \rho ^l |\nabla \phi ^l| + \sum _{m=0}^l \tau _m \frac{0}{\epsilon } \int _\varOmega |\nabla e_h^{m}|^0 \rho ^m|\nabla \phi ^{m}|\\&\quad \le 