15+(     )-4=20

41+5-(     )=43

(     )-19+8=25

16+(     )-8=29

6-4+(     )=26

43-(     )+7=41

34+(     )-6=35

(     )-1+4=24

(     )+3-2=27

(     )+15-14=25

(     )+34-24=13

19+(     )-17=21

20+(     )-25=23

18+31-(     )=45

29+11-(     )=31

20-(     )+26=26

(     )-17+13=44

(     )-11+26=44

0+36-(     )=23

6+33-(     )=32

3+30-(     )=21

16-(     )+32=44

23+12-(     )=28

11+(     )-4=22

(     )-4+34=39

4+18-(     )=14

(     )-7+26=26

(     )-6+8=49

(     )+1-1=38

33+(     )-0=39

28-(     )+11=11

25+(     )-1=28

3+39-(     )=23

(     )+21-7=33

(     )+13-9=31

(     )-4+30=32

42-(     )+0=34

32+11-(     )=34

(     )-1+14=30

37-(     )+3=29

(     )-29+15=19

50+0-(     )=50

(     )-15+31=41

(     )+4-1=35

40-38+(     )=2

4+(     )-34=14

8-(     )+39=45

4+43-(     )=25

16-(     )+41=43

(     )-16+19=33