LaTeX Blatt Template

blatt.cls

\ProvidesClass{blatt}
\LoadClass[12pt,a4paper,ngerman]{article}
\RequirePackage[utf8]{inputenc}
\RequirePackage[margin=2.5cm]{geometry}
\RequirePackage{german}
\RequirePackage{amssymb}
\RequirePackage{amsmath}
\RequirePackage{braket}

\pagenumbering{gobble}
\setlength{\parindent}{0cm}

\newcommand{\blatt}[2]{{
    \begin{center}
    \Large #1\\
    \LARGE \textbf{Blatt #2}
    \end{center}
}}

\newcommand{\aufgabe}[1]{{
    \addvspace{1cm}
    \noindent
    \Large
    \textbf{Aufgabe #1}
    \vspace{0.3cm}
    \\
}}

\renewcommand{\b}[1]{
    \textbf{#1}
}

\newcommand{\R}{
    \mathbb{R}
}

\newcommand{\N}{
    \mathbb{N}
}

\newcommand{\wo}{
    \setminus
}

main.tex

\documentclass{blatt}

\begin{document}

\blatt{Kursname}{03}

\aufgabe 1
\b{a)} \\
\[ N \in \N \]
\[ N \in \R \wo \Set{0} \]


\end{document}