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9

- 9













15













-  1

8

- 7













11













-  6

18 - 9 =













19













-  2

14













-  0

16













-  5

13 - 7 =













8 - 2 =

12 - 5 =

9

- 7













17 - 4 =













17 - 2 =













17 - 6 =













7 - 5 =













8 - 8 =













12 - 3 =













20

- 2













4 - 2 =













6 - 6 =













18













-  1

15













-  5

19

-  0

19

- 6













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