a) (1 3/4)^6 * (2/7)^6 = (7/4 * 2/7)^6 = (1/2)^6 = 1/64
b) (0,8)^4 : (2 2/3)^4 = (8/10 : 8/3)^4 = (8/10 * 3/8)^4 = (3/10)^4 = 81/10000
c) (4 1/2)^3 * (- 2/3)^3 * (-2)^3 = (9/2 * (-2/3) * (-8))^3 = (144/6)^3 = 24^3 = 13824
d) (2 1/2)^4 * 0,6^4 : (-15)^4 = (5/2 * 6/10 * (- 1/15))^4 = (-0,1)^4 = 0,0001
