решите срочно плиз
1-7/12
8-3/5
13 3/5-6
12-4 3/4
10 1/2-4 5-14
28 5/8+23 3/8
2 1/7+3 3/8
2 1/7 +3 3/2+4 5/21
12 7/12+3 8/9-4 3/4

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