\documentclass[reqno]{amsart}
\begin{document}
$\mathbf{U}(\mathbb{A}) \mathbf{A}(\mathbb{Q}) \backslash \mathbf{G}(\mathbb{A})$ and $\mathbf{G}(\mathbb{Q}) \backslash \mathbf{G}(\mathbb{A})$
\end{document}
