Find the sum Enter your answer in lowest terms in the box below as a fraction using the slash mark for the fraction bar?

4/10 + 3/9 = 11/15

2/12 + 3/17 = 35/102

7/9 - 5/13 = 46/117

7/17 + 4/11 = 145/187

9/10 - 4/12 = 17/30

7/20 + 3/9 = 41/60

3/15 + 12/18 = 13/15

5/13 + 6/11 = 133/143

7/11 - 6/18 = 10/33

4/16 + 2/13 = 21/52

8/11 - 4/15 = 76/165

7/3-5/13=46/117

6/18=3/19=28/57

14/15-4/12=3/5

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