[Tex/LaTex] What kind of integral is this

Question

can anyone tell me what kind of package or what to type for getting an integral like this on the image, where the \frac{happines}{time} is below death? All the integrals I can find will push the frac to after death.

Answer 1

With the help of the bigints package (cf. Big integral sign), and some negative space, using Steven's code as a starting point.

\documentclass{article} 
\usepackage{bigints}
\begin{document}
\[
\mathit{Life} = \hspace{-0.8em} \bigint_{\mathit{birth}}^{\mathit{death}}\hspace{-2.5em}\frac{\mathit{happiness}}{\mathit{time}} \Delta \mathit{time}
\]
\end{document}