I was writing an equation with the code below

```
\newcommand{\uint}[4]{      
       \ensuremath{\underset{#3}{\int_{\!{#1}}^{#2}{#4}}}
       }

\def \integrando {\rho_{\mathrm{\mu c}}\frac{\dd p^{3N} \dd q^{3N}} {h^{3N}}}
\begin{document}
     $$\uint{}{}{\mathrm{PhaseSpace}}{\integrando}=1$$
\end{document}

```

[![enter image description here](https://i.stack.imgur.com/Sxgsr.png)](https://i.stack.imgur.com/Sxgsr.png)

How to remove the space before "PhaseSpace" and aligh the \int with "PhaceSpace"?