:display <a a>
:display ~<a a>
:display <a,b>
:display ~<a,b>
:display \/{<a a>, <b b>}
:display /\{<a a>, <b b>}
:display [b,c]<b b>
:display ~[b,c]<b b>
:display ~|a|<b b>
:display [a]*<a a>
:display [a]*|%%|<a a>
=bcstar *\/{%||%<b>, %||%<c>}
:display \/{bcstar, *@{bcstar, %||%<a>, bcstar, %||%<a>, bcstar}}
:equal \/{bcstar, *@{bcstar, %||%<a>, bcstar, %||%<a>, bcstar}} *@{bcstar, *@{%||%<a>, bcstar, %||%<a>}, bcstar}