2/3+(-7/5)+5/6+(-7/12)

2/3 + (-7/5) + 5/6 + (-7/12) = 2/3 - 7/5 + 5/6 - 7/12 = 40/60 - 84/60 + 50/60 - 35/60 = (40 - 84 + 50 - 35)/60 = -29/60