5/4 + (-2/3) + 7/6 =
-3/12 + 5/4 + (- 2/3) =
-3/8 + (-2/3) + 4/12 =
-5/6 + 4/15 + 8/3 =
-3/4 + 6/8 + (-4/6) =
21/10
-17/24
-2/3
1/3
4/3
