5-(13/6+11/8-17/2) - (2 +1/6)=
(55/14 -10/7 -7/4) + (15/6 -3/2 - 2/3)=
7/3- (4/5 -1/3 +9/10) -( 3/5 +7/9 -11/15)=
5-(13/6+11/8-17/2) - (2 +1/6)=
(55/14 -10/7 -7/4) + (15/6 -3/2 - 2/3)=
7/3- (4/5 -1/3 +9/10) -( 3/5 +7/9 -11/15)=
T'ho già risposto.