%%
%% A DANTE-Edition example
%%
%%
%% Copyright (C) 2011 Herbert Voss
%%
%% 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.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{225.70511pt}
\setlength\parindent{0pt}
\usepackage{pst-blur,amsmath}
\begin{document}
\psblurbox{\parbox{0.9\linewidth}{%
\[F(x)=\int f(x)dx\]}}
\medskip
\psblurbox[blurbg=red]{%
\parbox{0.9\linewidth}{%
\[F(x)=\int f(x)dx\]}}
\bigskip
\psblurbox[blurbg=blue!30!red!80,
blurradius=5pt]{%
\parbox{0.9\linewidth}{%
\begin{align}
x_1 &= x_0-\frac{F(x_0)}%
{F^\prime(x_0)}\ge x_0
\end{align}}}
\end{document}