-7/12+(+1/8)+-(5/12)+(+3/4)
- 7/12 + 1/8 - 5/12 + 3/4 = -14/24 +3/24 - 10/24 + 18/24 = = - 24/24 + 21/24 = - 1 + 21/24 = - 3/24 = - 1/8