2/7*корень14*5/16*корень56 = 5/56*2корень14*корень14 = 10/56*14=5/56*7=35/56=5/8
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2/7*корень14*5/16*корень56 = 5/56*2корень14*корень14 = 10/56*14=5/56*7=35/56=5/8