%%
%% The LaTeX Companion, 3ed
%%
%% Example 12-3-28 on page II-249 in "newpxmath --- Using the PX fonts for math".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.0pt}
%StartShownPreambleCommands
\usepackage[upint]{newpxmath}
%StopShownPreambleCommands

\begin{document}
\[ \int \iint \iiint \iiiint \oint \oiint \oiiint
   \varointclockwise \ointctrclockwise
                              \fint \sumint \sqint \]
\[ \intsl \iintup \iiintsl \iiiintup
   \ointsl \oiintup   \ldots    \sumintsl \sqintup \]
\end{document}