( 5 3/7 : 1 1/14 - 2 5/9 ) * 18 - 3 4/7 : 1 3/7 = 43,
1) 5 3/7 : 1 1/14 = 38/7 : 15/14 = 38/7 * 14/15 = 76/15 = 5 1/15,
2) 5 1/15 - 2 5/9 = 76/15 - 23/9 = 228/45 - 115/45 = 113/45 = 2 23/45,
3) 2 23/45 * 18 =113/45 * 18/1 = 226/5 = 45 1/2 (или 45,5),
4) 3 4/7 : 1 3/7 = 25/7 : 10/7 = 25/7 * 7/10 = 2 1/2 (или 2,5),
5) 45 1/2 - 2 1/2 = 43 (или 45,5 - 2,5 = 43)