3 7/18 *1 121/149 - 1 11/151 *121/149 + 12 31/90 =
=(3 7/18-1 11/151)*121/149+ 12 31/90 =
=(3 1057\2718 - 1 198\2718)*121/149+ 12 31/90 =
= 2 859\2718*121\149+ 12 31/90 =
= 6295\ 2718 * 121\149+ 12 31/90 =
= 761695\4044982+12 31\90
