\documentclass[a4paper,11pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[greek,english]{babel}
\usepackage{amsmath}
\usepackage{alphabeta}
\title{title}
\author{ΠΑΠΠΑΣ}
\date{\today}

\begin{document}
\maketitle
\tableofcontents
\section{Ασκηση 1}

\subsection*{Εκφωνηση}
Να λυθει η εξισωση:
\begin{equation}
x^2-4x-4=0
\end{equation}

\subsection*{sol}
$x=2$
\end{document}
