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2014-09-14T22:21:07+03:00
29/7 + 272/100 = 29/7 + 68/25 = 725/175 + 476/175 = 1201/175 
1594/100 - 174/11= 787/50 - 174/11 = 8657/550 - 8700/550 = - 43/550
7/8 * 2/5 = 7/4 * 1/5 = 7/20
36/44 * 11/12 = 9/11 * 11/12 = 9/12 = 3/4
              
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