% inv op template
\documentclass[varwidth]{standalone}
\usepackage{amsmath}
\usepackage[normalem]{ulem} % [normalem] prevents the package from changing the default behavior of `\\emph` to underline.
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{align*}

\begin{document}
    <<diagram>>
\end{document}