7-(41/8-7/6)=7-(41*6/6*8-7*8/8*6)
=7-((246-56)/48)
=7-95/24
=(168-95)/24
=73/24
5+(16/3 - 26/9)=5+(16*3/3*3-26/9)
= 5+((48-26)/9)
= 5 + 22/9
= 45/9 + 22/9
= 67/9
9/5+(-8/3-2/3) = 9/5-10/3
= 9*3/15-10*5/15
= -23/15
(7/2-(-5/4)-3/7 = (7*2/2*2+5/4)-3/7
= 19/4-3/7
= 19*7/4*7-3*4/7*4
= 121/28
(-5/12-1/8)+(2-7/8)= (-5/12-1*1,5/8*1,5)+(16/8-7/8)
= -13/24+9/8
= -13/24+9*3/8*3
= 7/12
Voilà