\documentclass{article}

\usepackage[latin2]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[magyar]{babel}

\begin{document}

$\textit{not difficult 123}$\\
$\mathit{not difficult 123}$\\
$not difficult 123 \Gamma\Delta$\\
$\mathnormal{not difficult 123\Gamma\Delta}$

\end{document}