This is a test file with some referenced equations, line
\begin{equation} this \end{equation}
Some equations might be inside of text,
\begin{equation} for example \end{equation} this one.
Some equations might be on start of paragraphs:
\begin{equation} start \end{equation} of paragraph.
Other might be on separate paragraphs of their own:
\begin{equation} separate \end{equation}
Some of those can be labelled:
This is a test file with some referenced equations, line
\begin{equation} this \label{eq:0}\end{equation}
Some equations might be inside of text,
\begin{equation} for example \label{eq:1}\end{equation} this one.
Some equations might be on start of paragraphs:
\begin{equation} start \label{eq:2}\end{equation} of paragraph.
Other might be on separate paragraphs of their own:
\begin{equation} separate \label{eq:3}\end{equation}
Then they can be referenced:
Individually eq.~\ref{eq:0}, eq.~\ref{eq:1}, eq.~\ref{eq:2},
eq.~\ref{eq:3}
Or in groups eqns.~\ref{eq:0}, \ref{eq:1}, \ref{eq:3}
Groups will be compacted
eqns.~\ref{eq:0}, \ref{eq:1}, \ref{eq:3}, \ref{eq:2}