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id = 146
group = 'license_plates'
number = 53
visible = True
facts = None
solution = '''\
memb146(X, [X|_]).
memb146(X, [_|T]) :-
memb146(X, T).
conc146([], L, L).
conc146([H|T], L2, [H|L]) :-
conc146(T, L2, L).
genexp([Exp], Exp).
genexp(L, Exp) :-
conc146(Before, [N1,N2|After], L),
memb146(Op, ['+','-','*','/']),
NExp =.. [Op, N1, N2],
conc146(Before, [NExp|After], L1),
genexp(L1, Exp).
'''
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