3) (1/2)² * 4/5 = 1/4 * 4/5 = 1/5
4) (2 5/7)² * 14/19 = (19/7)² * 14/19 = 361/49 * 14/19 = 19/7 * 2/1 = 38/7 = 5 3/7
5) (2 1/3)² * 27/98 = (7/3)² * 27/98 = 49/9 * 27/98 = 1/1 * 3/2 = 3/2 = 1 1/2
6) (8/11)² * 11/32 = 64/121 * 11/32 = 2/11 * 1/1 = 2/11
7) (3/10)² * 5/6 = 9/100 * 5/6 = 3/20 * 1/2 = 3/40
8) (2/3)² * 15/24 = 4/9 * 15/24 = 1/3 * 5/6 = 5/18