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Hi all!

My MVE is
\documentclass{article}

\usepackage[latin2]{inputenc}
\usepackage[T1]{fontenc}
\def\magyarOptions{defaults=hu-min}
\usepackage[magyar]{babel}
\usepackage{amsmath}
\newcommand{\grad}[1]{{\mathrm{grad}} {\left( {#1} \right)}}% for gradient
\begin{document}

\begin{align}
\grad_P ...