\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{hyperref}
\usepackage{halloweenmath}
\begin{document}
\[
G \xrightswishingghost{h_{1}+\dots+h_{n}}
\bigpumpkin_{t=1}^{n} S_{t}
\]
\end{document}