`24 - 11`

= 13

`4 + 23`

= 27

`28 - 15`

= 13

`25 + 15`

= 40

`17 - 17`

= 0

`24 + 29`

= 53

`25 - 22`

= 3

`18 + 28`

= 46

`19 - 2`

= 17

`25 + 15`

= 40

`24 - 13`

= 11

`29 + 20`

= 49

`10 - 4`

= 6

`16 + 25`

= 41

`26 - 4`

= 22

`19 + 6`

= 25

`27 - 14`

= 13

`29 + 27`

= 56

`19 - 2`

= 17

`14 + 13`

= 27

`30 - 17`

= 13

`18 + 13`

= 31

`28 - 21`

= 7

`23 + 4`

= 27

`20 - 15`

= 5

`18 + 5`

= 23

`25 - 23`

= 2

`18 + 11`

= 29

`21 - 5`

= 16

`28 + 30`

= 58

`4 - 3`

= 1

`15 + 15`

= 30

`28 - 14`

= 14

`22 + 30`

= 52

`29 - 7`

= 22

`12 + 7`

= 19

`7 - 4`

= 3

`5 + 28`

= 33

`26 - 7`

= 19

`5 + 17`

= 22

`8 - 5`

= 3

`19 + 23`

= 42

`15 - 7`

= 8

`22 + 19`

= 41

`21 - 11`

= 10

`12 + 20`

= 32

`26 - 18`

= 8

`6 + 7`

= 13

`30 - 23`

= 7

`22 + 6`

= 28

`10 - 6`

= 4

`9 + 13`

= 22

`9 - 4`

= 5

`21 + 11`

= 32

`11 - 7`

= 4

`29 + 24`

= 53

`20 - 9`

= 11

`12 + 7`

= 19

`21 - 15`

= 6

`9 + 6`

= 15

`10 - 9`

= 1

`28 + 28`

= 56

`24 - 3`

= 21

`11 + 29`

= 40

`27 - 18`

= 9

`10 + 21`

= 31

`13 - 5`

= 8

`28 + 28`

= 56

`18 - 18`

= 0

`17 + 8`

= 25

`3 - 2`

= 1

`11 + 19`

= 30

`17 - 8`

= 9

`7 + 28`

= 35

`9 - 5`

= 4

`7 + 7`

= 14

`13 - 8`

= 5

`2 + 3`

= 5

`26 - 8`

= 18

`17 + 17`

= 34

`22 - 17`

= 5

`5 + 25`

= 30

`16 - 12`

= 4

`25 + 29`

= 54

`16 - 9`

= 7

`26 + 2`

= 28

`6 - 3`

= 3

`26 + 9`

= 35

`16 - 6`

= 10

`17 + 11`

= 28

`28 - 9`

= 19

`6 + 6`

= 12

`28 - 24`

= 4

`5 + 9`

= 14

`27 - 9`

= 18

`22 + 7`

= 29

`20 - 15`

= 5

`25 + 25`

= 50

`28 - 3`

= 25