Tính. (3/8+ -3/4+7/12) : 5/6+1/2. 6 5/12 : 2 3/4 + 11 1/4 . (1/3-1/5)

a, (3/8+ -3/4+7/12) : 5/6+1/2 
b, 6 5/12 : 2 3/4 + 11 1/4 . (1/3-1/5)
c, 0,25: (10,3-9,8)-3/4
d, 2 2/3. -/5. 0,375.(-10).-17/29
e, (3/5+0,415- 3/200).2 2/3.0,25