Odpowiedź:
3/7 + 2/3 = 9/21 + 14/21 = 23/21 = 1 i 2/21
1 i 1/4 + 2 i 1/2 = 1 i 1/4 + 2 i 2/4 = 3 i 3/4
2 i 1/3 + 3 i 1/2 = 2 i 2/6 + 3 i 3/6 = 5 i 5/6
2 i 7/3 - 1 i 1/6 = 2 i 14/6 - 1 i 1/6 = 1 i 13/6 = 3 i 1/6
4 i 7/5 - 2 i 2/3 = 4 i 21/15 - 2 i 10/15 = 2 i 11/15
