opendyslualatex

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\begin{document}

\begin{BoiteDys}{Mon titre}
\lipsum[1][1-3]

Et en math $f(x)=2x+1 +\dfrac{1}{x}$ ; $g(x)=\left(x^2+1\right)^3$.

$\displaystyle\int_0^4 x \rm{d}x = ?$.

$A = \dfrac{\rm{base} \times \rm{hauteur}}{2}$.
\end{BoiteDys}

\end{document}