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+\documentclass{ppex}
+\nonstopmode
+\usepackage {lucmin}\def \ttdefault {cmtt}
+\pagestyle{empty}
+
+\begin{document}
+\ResetPreambleCommands
+\ReadyForTheFray
+\usepackage {lucmin}\def \ttdefault {cmtt}
+The default math mode font is $math\ italic$. This should not be
+confused with ordinary \emph{text italic}.
+\verb|\mathbf| produces $\mathbf{bold}\mbox{-}\mathbf{face\ roman}$ letters.
+If you wish to have
+{\boldmath $bold\mbox{-}face\ math\ italic$} letters and bold-face Greek
+letters and mathematical symbols, use the \verb|\boldmath| command
+\emph{before} going into math mode. This changes the default math
+fonts to bold. Greek is available in upper and lower case:
+\(\alpha,\beta, \Gamma, \Delta \dots \omega, \Omega\)
+
+\begin{tabular}{ll}
+normal: \( x = 2\pi \Rightarrow x \simeq 6.28 \)\\
+mathbf: \(\mathbf{x} = 2\pi \Rightarrow x \simeq 6.28 \)\\
+boldmath: {\boldmath \(x = \mathbf{2}\pi \Rightarrow x
+ \simeq{\mathbf{6.28}} \)}\\
+\end{tabular}
+
+\noindent There is also a calligraphic font for upper-case letters;
+these are produced by the \verb|\mathcal| command:
+\( \mathcal{ABCDE} \)
+
+
+\begin{equation}
+ \phi(t)=\frac{1}{\sqrt{2\pi}}
+ \int^t_0 e^{-x^2/2} dx
+\end{equation}
+
+\begin{equation}
+ \prod_{j\geq 0}
+ \left(\sum_{k\geq 0}a_{jk} z^k\right)
+= \sum_{k\geq 0} z^n
+ \left( \sum_{{k_0,k_1,\ldots\geq 0}
+ \atop{k_0+k_1+\ldots=n} }
+ a{_0k_0}a_{1k_1}\ldots \right)
+\end{equation}
+
+\begin{equation}
+\pi(n) = \sum_{m=2}^{n}
+ \left\lfloor \left(\sum_{k=1}^{m-1}
+ \lfloor(m/k)/\lceil m/k\rceil
+ \rfloor \right)^{-1}
+ \right\rfloor
+\end{equation}
+
+\begin{equation}
+\{\underbrace{%
+ \overbrace{\mathstrut a,\ldots,a}^{k\ a's},
+ \overbrace{\mathstrut b,\ldots,b}^{l\ b's}}
+ _{k+1\ \mathrm{elements}} \}
+\end{equation}
+
+\begin{displaymath}
+\mbox{W}^+\
+\begin{array}{l}
+\nearrow\raise5pt\hbox{$\mu^+ + \nu_{\mu}$}\\
+\rightarrow \pi^+ +\pi^0 \\[5pt]
+\rightarrow \kappa^+ +\pi^0 \\
+\searrow\lower5pt\hbox{$\mathrm{e}^+
+ +\nu_{\scriptstyle\mathrm{e}}$}
+\end{array}
+\end{displaymath}
+
+\begin{displaymath}
+\frac{\pm
+\left|\begin{array}{ccc}
+x_1-x_2 & y_1-y_2 & z_1-z_2 \\
+l_1 & m_1 & n_1 \\
+l_2 & m_2 & n_2
+\end{array}\right|}{
+\sqrt{\left|\begin{array}{cc}l_1&m_1\\
+l_2&m_2\end{array}\right|^2
++ \left|\begin{array}{cc}m_1&n_1\\
+n_1&l_1\end{array}\right|^2
++ \left|\begin{array}{cc}m_2&n_2\\
+n_2&l_2\end{array}\right|^2}}
+\end{displaymath}
+\end{document}