a = (19,2)^3 × (19,2)^6
a = (19,2) ^(3+6)
a = (19,2)^9
b = (7,3)^13 : (7,3)^10
b = (7,3)^3
c = [(7,34)^7]^6
c = (7,34)^42
d = (15,8)^14 × (0,5)^14
d = (15,8 ×0,5)^14
d = (7,9)^14
