# Creating unique braces below equations [duplicate]

I would like to create something like this.

Specifically my question is about how those curly braces below are drawn and labelled.

• Have you considered the \underbrace macro? – Mico Jun 11 '18 at 8:12

## 1 Answer

equation is not complete (since you not provide code mwe), but finish it should not be a problem to you

\documentclass{article}

\begin{document}
$\int\underbrace{\int_0^\pi \frac{2y}{R^2}\left( ... \sqrt{1-\frac{y}{4}}\right)dy}_{\mathcal{A}} dx$
\end{document}


• Its very clear, thanks @Zarko! +1 – Abdulhameed Jun 11 '18 at 8:14