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+%%
+%% The LaTeX Companion, 2ed (second printing August 2004)
+%%
+%% Example 8-8-15 on page 516.
+%%
+%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
+%%    Johannes Braams, David Carlisle, and Chris Rowley
+%%
+%% It may be distributed and/or modified under the conditions
+%% of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%%
+%% See http://www.latex-project.org/lppl.txt for details.
+%%
+
+\documentclass{ttctexa}
+\pagestyle{empty}
+\setcounter{page}{6}
+\setlength\textwidth{351.0pt}
+
+  \setlength\textheight{.44\textheight}
+
+\StartShownPreambleCommands
+
+\usepackage{amsmath,amssymb}
+\newcommand\ibinom[2]{\genfrac\lbrace\rbrace{0pt}{}{#1}{#2}}
+\usepackage{txfonts}
+\usepackage{bm}
+
+\StopShownPreambleCommands
+\begin{document}
+\section{Sample page of mathematical typesetting}
+
+First some large operators
+both in text: \( \iiint\limits_{\mathcal{Q}}
+f(x,y,z)\,dx\,dy\,dz \) and
+\(\prod_{\gamma\in\Gamma_{\widetilde{C}}}
+\partial(\widetilde{X}_\gamma)\); and also on display:
+
+\begin{equation}
+\begin{split}
+%%     This line is deliberately long so as to show
+%%     differences in widths; it is a little over the measure
+%%     in article/cmr.
+\iiiint\limits_{\mathbf{Q}} f(w,x,y,z)\,dw\,dx\,dy\,dz  &\leq
+\oint_{\bm{\partial Q}} f' \left( \max \left\lbrace
+\frac{\lVert w \rVert}{\lvert w^2 + x^2 \rvert} ;
+\frac{\lVert z \rVert}{\lvert y^2 + z^2 \rvert} ;
+\frac{\lVert w \oplus z \rVert}{\lVert x \oplus y \rVert}
+\right\rbrace\right)
+\\
+&\precapprox \biguplus_{\mathbb{Q} \Subset \bar{\mathbf{Q}}}
+\left[ f^{\ast} \left(
+    \frac{\left\lmoustache\mathbb{Q}(t)\right\rmoustache}
+         {\sqrt {1 - t^2}}
+    \right)\right]_{t=\alpha}^{t=\vartheta}
+\end{split}
+\end{equation}
+
+For $x$ in the open interval \( \left] -1, 1 \right[ \)
+the infinite sum in Equation~\eqref{eq:binom1} is convergent;
+however, this does not hold
+throughout the closed interval \( \left[ -1, 1 \right] \).
+\begin{align}
+  (1 - x)^{-k} &=
+    1 + \sum_{j=1}^{\infty} (-1)^j \ibinom{k}{j} x^j
+    \text{\quad for $k \in \mathbb{N}$; $k \neq 0$.}
+    \label{eq:binom1}
+\end{align}
+\end{document}