\usepackage {pstcol,pst-text}
\begin{pspicture}(-4,-3.2)(3,0.2)
\psset{linecolor=lightgray}
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If you want to type
$3 \int^x_y = \sum^{n=1}_{33}$
and let it follow along a
curving line \ldots}
\end{pspicture}
Generated by dwww version 1.15 on Thu Jun 20 19:08:34 CEST 2024.