\newif\ifPublicPrinter
\PublicPrintertrue

\ifPublicPrinter
\PassOptionsToPackage{draft}{graphicx}
\fi

\documentclass[addpoints]{exam}
\usepackage{luacode,fontspec}
\usepackage{graphicx}
\usepackage{unicode-math,siunitx}

\ifPublicPrinter
\setmainfont{redacted-script-regular.ttf}
\setmathfont{redacted-script-regular.ttf}
\setmathfont[range=\mathup/{num}]{redacted-script-regular.ttf}
\setmathfont[range=\mathrm]{redacted-script-regular.ttf}
\setmathfont[range=\mathit]{redacted-script-light.ttf}
\setmathfont[range=\mathbf]{redacted-script-bold.ttf}
\setmathfont[range={"2032}]{redacted-script-regular.ttf}
\fi

\qformat{Question \thequestion\ (\totalpoints)\hfill}

\begin{document}

    \begin{questions}
        \question[7]
        some  text  to be replaced by a dummy one \textsuperscript{super} \textsubscript{sub}.

        \includegraphics[width=0.25\linewidth]{example-image}\vspace{\baselineskip}

        \underline{$\symbf{\Delta V \leq 5}~ \si{\kilo\m\per\hour}$}

        \[\num{-8e-06}~N_e^2 +  {0.072}~N_e - \beta\]

        \begin{tabular}{c}
            \hline
            some text\\
            another text\\
            \hline
        \end{tabular}
    \end{questions}
\end{document}