%% 
%%  Example 07-05-5 
%%  Copyright (C) 2017 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{328.62788pt}
\setlength\parindent{0pt}
\usepackage[T1]{fontenc}
%StartShownPreambleCommands
\usepackage{amsmath}
%StopShownPreambleCommands
\begin{document}
\[
\binom{x_R}{y_R} = %
    \kern-10pt\underbrace{r\vphantom{\binom{A}{B}}}_{\text{Scaling}}\kern-10pt%
    \cdot\underbrace{%
      \begin{pmatrix}
        \sin \gamma & -\cos \gamma \\
        \cos \gamma & \sin \gamma \\
      \end{pmatrix}%
    }_{\text{Rotation}}
  \binom{x_K}{y_K} +\kern-5pt%
  \underbrace{\binom{t_x}{t_y}}_{\text{Translation}}
\]
\end{document}
