(     )-37=37

(     )-2=71

(     )-13=40

(     )-21=45

(     )-50=7

(     )-12=55

(     )-67=23

(     )-20=37

(     )-51=26

(     )-55=30

(     )-38=30

(     )-12=46

(     )-72=1

(     )-37=18

(     )-18=57

(     )-73=13

(     )-23=50

(     )-15=77

(     )-53=37

(     )-60=12

(     )-14=42

(     )-58=31

(     )-6=46

(     )-56=10

(     )-26=46

(     )-40=28

(     )-36=18

(     )-10=44

(     )-52=1

(     )-48=46

(     )-36=40

(     )-6=69

(     )-49=41

(     )-48=43

(     )-53=47

(     )-56=41

(     )-17=60

(     )-27=73

(     )-12=78

(     )-23=32

(     )-56=2

(     )-19=53

(     )-25=33

(     )-27=31

(     )-68=10

(     )-8=51

(     )-33=42

(     )-17=44

(     )-64=6

(     )-65=3