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b)4 i 13/14-9/14=69/14-9/14=60/14=4 i 4/14=4 i 2/7
c)4 i 2/7-2 i 5/7=30/7-19/7=11/7=1 i 4/7
d)3/16-1/8=3/16-2/16=1/16
e)7 i 5/9-4/18=68/9-4/18=136/18=4/18=132/18=7 i 6/18=7 i 1/3
f)9 i 3/8-5/12=75/8-5/12=225/24-10/24=215/24=8 i 23/24