[Tex/LaTex] Best typesetting of formula

equationsmath-mode

Consider the following example.

\documentclass{article}

\usepackage{amsmath}

\newcommand*\mathsetfont{\mathbf}
\newcommand*\DeclareMathSet[1]{%
\expandafter\newcommand\csname set#1\endcsname{\mathsetfont{#1}}
}
\DeclareMathSet{N}
\DeclareMathSet{Q}

\begin{document}

\begin{align*}
&\{1983/4, 1985/4, 1986/4, 1987/4, 1989/4, 1990/4, 1991/4,\\
&\hphantom{{}\{} 1993/4, 1994/4, 1995/4, 1997/4, 1998/4, 1999/4\}
\subseteq \setQ\setminus\setN.
\end{align*}

\end{document}


What is the best way to typeset this formula?

The reason I ask, is that I think my try looks 'odd' with \subseteq \setQ\setminus\setN begin just below 1991/4.

My personal motto is if I have a clear message to convey, it's better to make it obvious

\documentclass{article}
\usepackage{amsmath,array}
\usepackage{xcolor,cancel}

\newcommand*\mathsetfont{\mathbf}
\newcommand*\DeclareMathSet[1]{%
\expandafter\newcommand\csname set#1\endcsname{\mathsetfont{#1}}
}
\DeclareMathSet{N}
\DeclareMathSet{Q}

\begin{document}

$\left\{ \begin{array}{c@{,}c@{,}c@{,}c@{,}} \ldots &\ldots &\frac{1983}{4} &\cancel{\textcolor{red}{\frac{1984}{4}}}\\[1ex] \frac{1985}{4} &\frac{1986}{4} &\frac{1987}{4} &\cancel{\textcolor{red}{\frac{1988}{4}}}\\[1ex] \frac{1989}{4} &\frac{1990}{4} &\frac{1991}{4} &\cancel{\textcolor{red}{\frac{1992}{4}}}\\[1ex] \frac{1993}{4} &\frac{1994}{4} &\frac{1995}{4} &\cancel{\textcolor{red}{\frac{1996}{4}}}\\[1ex] \frac{1997}{4} &\frac{1998}{4} &\frac{1999}{4} &\ldots \end{array} \right\}\subseteq \setQ\setminus\setN.$

\end{document}


You can actually make a new column type to ease up the entries. But I always confuse myself with >{}, <{} groups. Block selection of text seemed easier this time :)

EDIT: Converted to a sequence such that mathematically sensitive ones are less offended.