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para ahoritaxfa

6/10 + 9/5.

2/7 + 9/3

12/9 - 2/3

23/4 - 5/2

18/8 - 7/5

7/10 - 2/5

15/6 - 4/8

5/7 - 6/13

7/12 - 4/8

17/ 14 - 5/7

7/3 - 6/4

4/9 - 1/3