49-(     )=31

28-(     )=14

(     )-18=18

(     )-15=15

24-(     )=22

26-(     )=20

(     )-10=19

(     )-21=23

(     )-4=25

(     )-19=19

21-(     )=8

21-(     )=10

29-(     )=21

(     )-12=11

29-(     )=22

(     )-23=23

(     )-3=40

50-(     )=28

21-(     )=12

27-(     )=13

(     )-6=44

29-(     )=12

42-(     )=14

30-(     )=19

25-(     )=4

(     )-32=11

31-(     )=1

38-(     )=38

27-(     )=20

(     )-15=15

21-(     )=18

(     )-6=16

33-(     )=5

28-(     )=10

42-(     )=15

(     )-27=7

(     )-20=17

26-(     )=9

34-(     )=15

(     )-10=13

41-(     )=30

37-(     )=32

(     )-39=9

26-(     )=4

40-(     )=38

(     )-33=15

45-(     )=9

33-(     )=4

44-(     )=15

43-(     )=39