Looking at the MWE below, the fontsize of the last exponent got enlarged after applying \overbrace. How to get its size back to the original as if the overbrace weren't there? Thank you!
\documentclass{article}
\begin{document}
\[
e^{-t/\tau} + e^{-\overbrace{t/\tau}^{\theta}}
\]
\end{document}
\scriptstyle t/\tau– Sigur Dec 04 '19 at 12:47