%%
%%  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}