1/72=7/504 и 1/56=9/504
1/48=3/144 и 1/72=2/144
2/77=8/308 и 3/44=21/308
1/51=4/204 и 1/68=3/204
5/36=15/108 и 7/54=14/108
9/35=54/210 и 11/42=55/210
4/49=36/441 и 5/63=35/441
15/98=540/3528 и 13/72=637/3528
