1) 5\9 + 1 5\7 * (4 2\3 - 2 5\8) / 1 3\4 =
1. 4 2\3 - 2 5\8 = 14\3 - 21\8 = 112\24 - 63\24 = 49\24
2. 1 5\7 * 49\24 = 12\7 * 49\24 = 7\2
3. 7\2 /1 3\4 = 7\2 * 4\7 = 2
4. 5\9 + 2\1 = 5\9 + 18\9 = 23\9 = 2 5\9
2) 2 - 3 1\7 * ( 2 - 1 9\11) / 8\21 =
1. 2 - 1 9\11 = 1 11\11 - 1 9\11 = 2\11
2. 3 1\7 * 2\11 = 22\7 * 2\11 = 4\7
3. 4\7 / 8\21 = 4\7 * 21\8 = 3\2
4. 2 - 3\2 = 1 2\2 - 3\2 = 4\2-3\2 = 1\2
3) 2 1\3 + 4 1\10 / (2 7\15 - 5\12) * 5\6 =
1. 2 7\15 -5\12 = 37\15 - 5\12 = 148\60 - 25\60 = 123\60
2. 4 1\10 / 123\60 = 41\10 * 60\123 = 6\3
3. 6\3 * 5\6 = 5\3
4. 2 1\3 + 5\3 = 2 6\3
4) 4 5\12 - 1 1\2 / (2 1\6 + 8\15) * 1 4\5 =
1. 2 1\6 + 8\15 = 19\6 + 8\15 = 95\30 + 16\30 = 111\30
2. 1 1\2 / 111\30 = 3\2 * 30\111 = 15\37
3. 15\37 * 1 4\5 = 15\37 * 9\5 = 27\37
4. 4 5\12 - 27\37 = 53\12 - 27\37 = 3 305\444