2/5 + 1/14 = (28/70) + (5/70) = 33/70
-1/5 - 5/6 = (-12/60) - (50/60) = -62/60 = -31/30
-5/8 + 1/2 = (-40/80) + (40/80) = 0
2/5 + 1/14 = (28/70) + (5/70) = 33/70
-1/5 - 5/6 = (-12/60) - (50/60) = -62/60 = -31/30
-5/8 + 1/2 = (-40/80) + (40/80) = 0