23-( )=11
38-( )=38
( )-21=2
( )-20=29
31-( )=13
( )-17=29
( )-24=16
( )-35=15
( )-27=19
38-( )=31
( )-30=11
30-( )=20
35-( )=7
29-( )=0
41-( )=38
( )-28=16
( )-17=31
( )-13=15
46-( )=28
42-( )=29
34-( )=10
32-( )=18
34-( )=4
( )-20=1
44-( )=39
( )-4=21
37-( )=12
( )-11=16
( )-2=31
( )-23=25
( )-20=25
39-( )=31
( )-11=14
38-( )=16
( )-12=32
( )-4=18
( )-37=6
( )-22=12
( )-18=24
( )-9=38
( )-9=20
48-( )=19
( )-21=3
44-( )=19
35-( )=18
32-( )=11
39-( )=27
27-( )=24
( )-13=29
39-( )=20