8 1/5-3 2/7=
5 6/13-2 2/3=
9 3/10-4 3/5=
2 3/14-1 1/7=

5 6/13- 2 2/3=5 18/39- 2 26/39=4 57/39-2 26/39=2 31/398 1/5- 3 2/7=8 7/35-3 10/35=7 42/35- 3 10/35=4 32/359 3/10- 4 3/5=8 13/10- 4 6/10=4 7/102 3/14- 1 1/7=2 3/14-1 2/14=1 1/14