() & n = n
()() & n = n*2
(()) & n = ()()()...()()() & n with n ()'s
(())() & n = (()) & n + n
(())(()) & n = (())()()()...()()() & n with n ()'s
(()()) & n = (())(())(())...(())())()) & n with n (())'s
((())) & n = (()()()...()()()) & n with n ()'s
((())()) & n = ((()))((()))...((())) & n with n ((()))'s
((())(())) & n = ((())()()()...()()()) & n with n ()'s
((()())) & n = ((())(())...(())(())) & n with n (())'s
(((()))) & n = ((()()()...()()())) & n with n ()'s
[] & n = (((...((()))...))) & n with n levels
[][] & n = [](((...((()))...))) & n with n levels
[()] & n = [][][]...[][][] & n with n []'s
[()()] & n = [()][()][()]...[()][()][()] & n with n [()]'s
[()()()] & n = [()()][()()][()()]...[()()][()()][()()] & n with n [()()]'s
[(())] & n = [()()()...()()()] & n with n ()'s
[[]] & n = [(((...((()))...)))] & n with n levels
[[][]] & n = [[](((...((()))...)))] & n with n levels
[[()]] & n = [[][][]...[][][]] with n []'s
[[[]]] & n = (((...((()))...))) & n with n levels
{} & n = [[[...[[[]]]...]]] & n with n levels
{()} & n = {}{}{}...{}{}{} & n with n {}'s
{{}} & n = {[[[...[[[]]]...]]]} & n with n levels
etc.
Let replace () into ()_(), [] into ()_()(), {} into ()_()()(), etc.
Finally, limit is ()_()_()_..._()_()_()() & n.