%%
%% The LaTeX Companion, 3ed
%%
%% Example 11-4-24 on page II-173 in "mathtools, interval --- Properly spaced intervals".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3examargin}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{165.0pt}

%StartShownPreambleCommands
\usepackage{color,interval}
\intervalconfig{soft open fences,separator symbol=..,
                colorize=\color{blue}}
%StopShownPreambleCommands

\begin{document}
\[
  \rinterval{a}{d} = \interval{a}{b} +
   \linterval{b}{c} + \ointerval{c}{e}
                    - \rinterval[scaled=\Bigg]{d}{e}
\]
\end{document}