\begin{center}\begin{minipage}{15cm}\begin{Verbatim}[frame=single]
> match [| exp(sin(x)), sin(x), 4, DE(x), 9... |] with
        exp(a) .: (a .: (([||] :. 4) @ (b @ [| 13... |]))) : 
                           { "a = ", a, ", b = ", b; };
a = sin(x), b = [|doubleextended(x), 9, 10, 11, 12|]
> 
> match [| 1, 2, 3, 4, D... |] with 
        a @ [| 4, D...|] : (a);
[|1, 2, 3|]
> 
> match [| 1, 2, 3, 4, D... |] with 
        a @ [| D...|] : (a);
[|1, 2, 3, 4|]
> 
> match [| 1, 2, 3, 4... |] with 
        a @ [| 3...|] : (a);
[|1, 2|]
> 
> match [| 1, 2, 3, 4... |] with 
        a @ [| 4...|] : (a);
[|1, 2, 3|]
> 
> match [| 1, 2, 3, 4... |] with 
        a @ [| 17...|] : (a);
[|1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16|]
> 
> match [| 1, 2, 3, 4... |] with 
        a @ [| 17, 18, 19 |] : (a)
        default              : ("Something else");
Something else
\end{Verbatim}
\end{minipage}\end{center}
