1) -(1/3) - (1/2) + 1 = -1/3 - 1/2 + 1
= - 2/6 - 3/6 + 6/6
= -5/6

2) (1/2) + (1/4) - 1 = 1/2 + 1/4 - 1
= 2/4 + 1/4 - 4/4
= 3/4 - 4/4
= -1/4