Custom package pour prendre des notes

dagnotes.sty

\ProvidesPackage{dagnotes}

\RequirePackage[T1]{fontenc}
\RequirePackage[utf8]{inputenc}
\RequirePackage[francais]{babel}
\RequirePackage{amsmath, amssymb}
\RequirePackage{setspace}
\RequirePackage[margin=1in]{geometry}

\newcommand{\formatdoc}{
    \setlength{\parindent}{0pt}
    \onehalfspacing
    \renewcommand{\labelitemi}{$\bullet$}
    \renewcommand{\labelitemii}{$\circ$}
}

\newcommand\ra\rightarrow
\newcommand\la\leftarrow
\newcommand\lra\leftrightarrow
\newcommand\ua\uparrow
\newcommand\da\downarrow
\newcommand\uda\updownarrow
\newcommand\nea\nearrow

\newcommand\Ra\Rightarrow
\newcommand\La\Leftarrow
\newcommand\Lra\Leftrightarrow

\newcommand\mat[1]{\begin{bmatrix} #1 \end{bmatrix}}
\newcommand\smat[1]{\setstretch{1}{\ensuremath{\scalefont{0.8}\mat{#1}}}}

\newcommand{\bra}[1]{\ensuremath{\left\langle#1\right|}}
\newcommand{\ket}[1]{\ensuremath{\left|#1\right\rangle}}
\newcommand{\bracket}[2]{\ensuremath{\left\langle #1 \middle| #2 \right\rangle}}
\newcommand{\matrixel}[3]{\ensuremath{\left\langle #1 \middle| #2 \middle| #3 \right\rangle}}
\newenvironment{eq*}{\begin{equation*}\begin{gathered}}{\end{gathered}\end{equation*}}
\newenvironment{eqs*}{\begin{equation*}\begin{aligned}}{\end{aligned}\end{equation*}}

\endinput