bonsoir (1/3-3/8+1)=1x8-3x3/8x3
8-9/24=-1/24+1=-1/24+24/24=-23/24
(3+1/8+7/3)=24/8+1/8=25/8+7/3=25x3+8x7/8x3=75+56/24=131/24
-23/24-131/24=-154/24=-77/12
(3/4-1/3)=9-4/12=5/12
(3-(1/3-3/4))=4-9/12=-5/12et 3-5/12=36/12-5/12=31/12
5/12-31/12=-26/12=-13/6
(-5/3+7)=-5/3+21/3=16/3
(1/3-3/4)=4-9/12=-5/12
3-5/12=36/12-5/12=31/12
16/3-31/12=192-93/36=99/36=33/12=11/4 en espérant ne pas me tromper