Răspuns:
11/12·7/24·21/22+[(2·7+1)/7+(1·7+1)/7]·(1·6+1)/6=
(1617/6336)⁽³³+(16/7+8/7)·7/6=
49/192+24/7·7/6=
49/192+¹⁹²⁾4/1=
49/192+768/192=
817/192
