My fairly basic math template for LaTeX

math.tex

\documentclass{article}


% Document metadata - set here
\newcommand{\metatitle}{<++>}
\newcommand{\shorttitle}{<++>}
\newcommand{\metaauthor}{Tay, Nicholas}
\newcommand{\metaemail}{<++>}
\newcommand{\metadate}{<++>}


% ------------------- Preamble --------------------
\usepackage[a4paper, margin=2cm, top=3cm, bottom=2cm]{geometry} % A4 paper with my standard margins
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{mathtools}
\usepackage{fancyhdr}
\usepackage[shortlabels]{enumitem}
%\usepackage{amsthm}
%\usepackage{framed}
%\usepackage{float}
%\usepackage{tikz}
%\usepackage{pgfplots}

\usepackage[parfill]{parskip}


% PDF data + hyperref
\usepackage[pdftex, pdfauthor={\metaauthor{} <\metaemail{}>}, pdftitle={\metatitle{}}]{hyperref}

% Title
\title{\metatitle{}}
\author{\metaauthor \\ \href{mailto:\metaemail{}}{\small \textit{\metaemail{}}}}
\date{\metadate{}}

% Header settings
\pagestyle{fancy}
\fancyhf{}
\lhead{\shorttitle{}}
\rhead{\metaauthor{}}
\cfoot{\thepage}

% Math macros
% absolute val
\DeclarePairedDelimiter\abs{\lvert}{\rvert}

% vectors - use bold, \veca is the old one
\let\veca\vec
\renewcommand{\vec}[1]{\mathbf{#1}}

% more shortcuts
\newcommand{\Real}{\mathbb{R}}

% ------------------- End Preamble --------------------

\begin{document}
\maketitle

<++>
\end{document}

math_homework.tex

\documentclass{article}


% Document metadata
\newcommand{\metatitle}{<++>}
\newcommand{\shorttitle}{<++>}
\newcommand{\metaauthor}{Nicholas Tay}
\newcommand{\metaemail}{<++>}
\newcommand{\metadate}{<++>}


% Slight modification of my standard math.tex for just homework-like stuff
% ------------------- Preamble --------------------
\usepackage[a4paper, margin=2cm, top=3cm, bottom=2cm]{geometry} % A4 paper with my standard margins
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{mathtools}
\usepackage{fancyhdr}
\usepackage[shortlabels]{enumitem}
%\usepackage{amsthm}
%\usepackage{cancel}

\usepackage[parfill]{parskip}


% PDF data + hyperref
\usepackage[pdftex, pdfauthor={\metaauthor{} <\metaemail{}>}, pdftitle={\metatitle{}}]{hyperref}

% Header settings
\pagestyle{fancy}
\fancyhf{}
\lhead{\metaauthor{}}
\chead{\shorttitle{}}
\rhead{\metadate{}}
\cfoot{\thepage}

% Math macros
\DeclarePairedDelimiter\abs{\lvert}{\rvert}

% vectors - use bold, \veca is the old one
\let\veca\vec
\renewcommand{\vec}[1]{\mathbf{#1}}

% more shortcuts
\newcommand{\Real}{\mathbb{R}}
\newcommand{\Nat}{\mathbb{N}}
\newcommand{\calP}{\mathcal{P}}

\newcommand{\T}{\text{\textsf{T}}}
\newcommand{\F}{\text{\textsf{F}}}

% ------------------- End Preamble --------------------

\begin{document}
\thispagestyle{empty}
\begin{center}
	\Large{\textbf{\metatitle{}}} \\ \large{\metaauthor{} \\ \href{mailto:\metaemail{}}{\small \textit{\metaemail{}}} \\ \metadate{}}
\end{center}

<++>
\end{document}