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\SQUARE{5}\sol
The \texttt{\textbackslash sol}
command contains the square of $5$:
\[5^2=\sol\]
\begin{center}
\SQUAREROOT{5}\sol
Now, the \texttt{\textbackslash sol}
command is the square root of $5$:
\[\sqrt{5}=\sol\]
\end{center}
On having gone out of the \texttt{center}
environment,
the command recovers its previous value:
\sol
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