Odpowiedź:
(2/3 - 1/4) * 3 i 1/5 = (8/12 - 3/12) * 3 i 1/5 = 5/12 * 3 i 1/5 = 5/12 * 16/5 = 4/3 = 1 i 1/3
3 * 2 i 2/3 - (1 i 1/6)² = 3 * 8/3 - (7/6)² = 8 - 49/36 = 7 i 36/36 - 1 i 13/36 = 6 i 23/36
1 i 4/5 * (3 i 2/3 - 1 i 5/6) + (1/2)³ = 1 i 4/5 * (3 i 4/6 - 1 i 5/6) + (1/2)³ = 1 i 4/5 * (2 i 10/6 - 1 i 5/6) + (1/2)³ = 9/5 * 1 i 5/6 + 1/8 = 9/5 * 11/6 + 1/8 = 33/10 + 1/8 = 3 i 3/10 + 1/8 = 3 i 12/40 + 5/40 = 3 i 17/40
