4 : 5/42 + 3/8 - 2/7 * 4/3

Question

Вопрос:

Ответ:

Accepted Answer

4 : 5/42 + 3/8 - 2/7 * 4/3
4 * 42/5 + 3/8 - 8/21
168/5 + 3/8 - 8/21
168/5 + (63 - 160)/168
168/5 - 97/168
(28224 - 485)/840 = 27739/840