Welcome to the site. We will appreciate the questions that have a minimal working example (code) that shows the efforts you have already put. Asking somebody to do things is frowned upon here. If you have no idea of how to start, you may put the following as a MWE
\documentclass{article}
\begin{document}
%equation here
\end{document}
and ask for the equation code. Since this is your first question, here is the code for the equation you requested and this should get you started.
Best Answer
EDIT:
If you want the type of brackets that Barbara Beeton think you might want, then the following would work.