My take on code listings in latex.
\begin{codebox}{$\mathsf{Gb}'(C, \{s_i\}_{i \in [q^{2d}]}, x_1, \delta_1, \cdots, x_n, \delta_n)$}
\comment{Combine the \delta{}s using addition mod $q^{2d}$}\\
$\Delta = \{ \sum_{j \in [\lambda]} \delta_{i,j} \mod q^{2d}\}_{i \in [n]}$\\
\\
\comment{Combine the seeds using \Delta}\\
$r = \bigoplus_{i \in [\lambda]} s_{\Delta_i}$\\
\\
\comment{Call \textsf{Gb} and \textsf{En} using $r$}\\
return $\Gb(C; r),\, \En(x_1 || \dots || x_n; r)$
\end{codebox}