%% trace?
q(AA,AA,BB,BB).
listing(q)?
listing(1,2)?
listing(1.5,7.9)?
listing("1.5","abc")?
listing(listing)?
listing(+)?
listing(*)?
listing(eval(8 + 7))?
C=cos(0.5), listing(C)?
E=tan(G),listing(E,G)?
E=tan(C),listing(E,C)?
