Estilo.sty

\usepackage{titlesec, pdfpages, spverbatim, fancyvrb, fvextra, caption, color,  subfig,  
graphicx,  epstopdf,  enumitem,  xcolor, amsmath,  amssymb, amsfonts, bm}
\usepackage[pages=some]{background}
\usepackage{setspace, float}
\usepackage[brazil]{babel}


\titleformat{\chapter}[display]
  {\normalfont\huge\bfseries\center}{}{0pt}{\Huge}
\titlespacing*{\chapter}
  {0pt}{0pt}{40pt}

\newcommand{\red}[1]{\textcolor{red}{{#1}}} 


\backgroundsetup{
scale=1.2,
color=black,
opacity=0.08,
angle=0,
pages=all,
contents={%
  \includegraphics[width=\paperwidth, height=\paperheight]{ChicagoCrime.png}
  }%
}


\newcommand{\bfx}{{\bm{x}}}
\newcommand{\bfh}{{\bm{h}}}
\newcommand{\bfa}{{\bm{a}}}
\newcommand{\bfb}{{\bm{b}}}
\newcommand{\bfW}{{\bm{W}}}
\newcommand{\bftheta}{\bm{\theta}}