Ответил: visceral Решено 13/21 * (9/26 — 2 3/13) — (-2/3)³ = — 47/54, 1) 9/26 — 2 3/13 = 9/26 — 29/13 = 9/26 — 58/26 = — 49/26 = -1 23/26, 2) 13/21 * (-1 23/26) = -13/21 * 49/26 = -7/6 = — 1 1/6, 3) (-2/3)³ = -8/27, 4) — 1 1/6 — (-8/27) = -7/6 + 8/27 = -63/54 + 16/54 = — 47/54. Поиск других ответов-
13/21 * (9/26 — 2 3/13) — (-2/3)³ = — 47/54,
Поиск других ответов1) 9/26 — 2 3/13 = 9/26 — 29/13 = 9/26 — 58/26 = — 49/26 = -1 23/26,
2) 13/21 * (-1 23/26) = -13/21 * 49/26 = -7/6 = — 1 1/6,
3) (-2/3)³ = -8/27,
4) — 1 1/6 — (-8/27) = -7/6 + 8/27 = -63/54 + 16/54 = — 47/54.