[tex]\displaystyle\\
a)~~(19,2)^3\cdot(19,2)^6 = (19,2)^{3+6}=(19,2)^9\\\\
b)~~(7,3)^{13}:(7,3)^{10} = (7,3)^{13-10}=(7,3)^{3}\\\\
c)~~\left[(7,34)^5\right]^6=(7,34)^{5\cdot 6}=(7,34)^{30}\\\\
d)~~(15,8)^{14}\cdot(0,5)^{14} =(15,8\cdot 0,5)^{14}=(7,9)^{14}
[/tex]
