\documentclass{article}
\usepackage{epsfig}
\pagestyle{empty}
\begin{document}
$Z$
\pagebreak

\[ Z=\frac{\sum_{i=1}^n{\frac{Z_i}{r_i^p}}}{\sum_{i=1}^n{\frac{1}{r_i^p}}} \]
\pagebreak

$Z_i$
\pagebreak

$i$
\pagebreak

$r$
\pagebreak

$p$
\pagebreak

$n$
\pagebreak

$w$
\pagebreak

\[ w=\frac{1}{r^p} \]
\pagebreak

\[ Z=\frac{\sum_{i=1}^n{Z_i}}{n} \]
\pagebreak

\[ Z=\min{(Z_1,Z_2,\ldots,Z_n)} \]
\pagebreak

\[ Z=\max{(Z_1,Z_2,\ldots,Z_n)} \]
\pagebreak

\[ Z=\max{(Z_1,Z_2,\ldots,Z_n)}-\min{(Z_1,Z_2,\ldots,Z_n)} \]
\pagebreak

$radius_1$
\pagebreak

$x$
\pagebreak

$radius_2$
\pagebreak

$y$
\pagebreak

$angle$
\pagebreak

\end{document}
