330 B
330 B
\newcommand{\div}[4]{
\begin{array}{r|l}
#1 & #2\
\hline
\begin{array}[t]{r}#4\end{array} & \begin{array}[t]{l}#3\end{array}
\end{array}
}
\newcommand{\matp}[3]{ \begin{array}{cc} & #2 \ #1 & #3 \end{array} }
\newcommand{\R}{\mathbb{R}}
\newcommand{\C}{\mathbb{C}}
\newcommand{\N}{\mathbb{N}}
\newcommand{\Z}{\mathbb{Z}}