ajutor ajutor ajutor
dau coroana :)

13/16+(5/48-4/10×5/4)×(23/10-5/7×7/5-3/10)=
13/16+(5/48-1/2)×(23/10-1-3/10)=
13/16+(5/48-24/48)×(23/10-10/10-3/10)=
13/16-19/48×1=
39/48-19/48=20/48=10/24=5/12