14 - 4/7 = (14*7 - 4)/7 = (98 - 4)/7 = 94/72/5 : 94/7 = 2/5 * 7/94 = (2*7)/(5*94) = 14/47011/15 = (11 * 94) / (15 * 94) = 1034 / 141014/470 = (14 * 3) / (470 * 3) = 42 / 14103/5 = (3 * 282) / (5 * 282) = 846 / 14101034/1410 - 42/1410 + 846/1410 = (1034 - 42 + 846) / 1410 = 1838 / 14101838 / 1410 = 919 / 705Ответ: 919/705