JeT
**My question**

I toggle elements between beamer and article (again...).
This time I'd like have a correspondence between a marginnote of just one equation in article, and a frame with the same equation, but scaled to \textwidth

https://tex.stackexchange.com/questions/38352/resize-scale-equation-in-beamer

and

https://tex.stackexchange.com/questions/448654/automatically-resize-equations

based on the last one for MWE.

\end{equation*}
\end{frame}
}
}

\begin{document}

\begin{frame}
\frametitle{Title}
\lipsum[1]
\end{frame}

\hackEq
{%
\displaystyle R=\frac{\sum_{i=1}^{m}\left(F_{i}+s\right) t_{i} D_{i}}{\sum_{i=1}^{m} \tau_{i} D_{i}}
}%
{Equation Name or very short sentence.}

\end{document}



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