7/14+3/49÷(9-8 13/14)-2/7=1/2+3/49×14 - 2/7=1/2+6/7-2/7=1/2+4/7=7/14+8/14=15/14=1 целая 1/14
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7/14+3/49÷(9-8 13/14)-2/7=1/2+3/49×14 - 2/7=1/2+6/7-2/7=1/2+4/7=7/14+8/14=15/14=1 целая 1/14