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// mpW4d.cpp
#ifndef MPW4D_CPP
#define MPW4D_CPP

#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/fwd.hpp>
#include <string>
#include <vector>

struct aStruct {

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// words4digits.cpp
#ifndef WORDS4DIGITS
#define WORDS4DIGITS

// in: unsigned long long (ull)
// out: string &

#include <string>
#include <vector>

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// mpGroup.cpp  
/*
 * for digit grouping of boost cpp_int variables 
 */
#ifndef MPGROUP
#define MPGROUP 

#include <boost/multiprecision/cpp_int.hpp>
#include <iostream>

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// timestamp.cpp

#ifndef TIMESTAMP
#define TIMESTAMP

#include <sstream>
#include <string>

void timestamp(std::string &, bool = true, bool = true);

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% brackets may be (...), [...], \{...\}, or left out
\[
\left[
   \begin{array}{cc}
      a & b \\
      c & d 
   \end{array}
\right]
\]

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\[
\begin{split}
	a = {}& b + c \\
        {}& + d + e \\
\end{split}
\]

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% requires amsmath; align* for no eq. number
\begin{align} 
   	x &= y + z \\
	x &= y + z
\end{align}

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% Requires the booktabs if the memoir class is not being used
\begin{table}[htbp]
   \centering
   %\topcaption{Table captions are better up top} % requires the topcapt package
   \begin{tabular}{@{} lcr @{}} % Column formatting, @{} suppresses leading/trailing space
      \toprule
      \multicolumn{2}{c}{Item} \\
      \cmidrule(r){1-2} % Partial rule. (r) trims the line a little bit on the right; (l) & (lr) also possible
      Animal    & Description & Price (\$)\\
      \midrule

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\begin{figure}[htbp]
   \centering
   \includegraphics{example.jpg} % requires the graphicx package
   \caption{example caption}
   \label{fig:example}
\end{figure}

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\documentclass[12pt]{article}
\usepackage{amsmath,amssymb}  					% Better maths support & more symbols
\usepackage{array} 								% for better arrays (eg matrices) in maths
\usepackage{bm}  								% Define \bm{} to use bold math fonts
\usepackage{booktabs} 							% for much better looking tables
\usepackage{fancyhdr} 							% This should be set AFTER setting up the page geometry
\usepackage{flafter}  							% Don't place floats before their definition
\usepackage{geometry}             				% See geometry.pdf to learn the layout options. There are lots.
\usepackage{graphicx}							% makes drawing easier
\usepackage{epstopdf}							% graphics conversion