Center beamer equations and decrease the font of the equation number indication

Question

I'm having trouble centering the presentation equations. I've used \centering, \gather among others and it doesn't want to center.

\begin{equation}
\centering
\begin{split}
\scriptstyle\phi = \frac{v_1}{\sqrt{2}\cdot f\cdot N_1}\cdot \int^t_0sin\>\omega t\\
    \scriptstyle= \frac{v_1}{\sqrt{2}\cdot f\cdot N_1}\cdot(1-cos\>\omega t)\\
    \scriptstyle= \phi_{max}-\phi_{max}\cdot cos\>\omega t\\
\end{split}  
\end{equation}

The beamer model I'm using is this:

https://pt.overleaf.com/latex/templates/examen-profesional-itam/xkppkzscmxhc

Answer 1

It is not entirely clear, what is your problem nor how you got showed slide. Using usual way to write MWE (Minimal Working Example) for beamer presentation ehere in one frame are image and equation, compilation of MWE gives:

\documentclass{beamer}
\begin{document}
\begin{frame}
    \begin{figure}
    \centering
\includegraphics{example-image-duck-portrait}
\caption{Imagem adaptada de ...}
    \end{figure}
    \begin{equation}
\begin{split}
\scriptstyle\phi = \frac{v_1}{\sqrt{2}\cdot f\cdot N_1}\cdot \int^t_0sin>\omega t\
    \scriptstyle= \frac{v_1}{\sqrt{2}\cdot f\cdot N_1}\cdot(1-cos>\omega t)\
    \scriptstyle= \phi_{max}-\phi_{max}\cdot cos>\omega t\
\end{split}
    \end{equation}
\end{frame}
\end{document}