Using texpower v0.1a with the following small example
\documentclass{article}
\usepackage{amsmath}
\usepackage[colormath]{texpower}
\begin{document}
\begin{equation}
\begin{split}
A & B
\end{split}
\end{equation}
\end{document}
gives an error:
! Missing } inserted.
<inserted text>
}
l.9 \end{equation}
Removing the colormath option and the error is gone.