a) [tex]2 * 2^3 * 8^5 = 2 * 2^3 * (2^3)^5 = 2 * 2^3 * 2^{15} = 2^{19}[/tex]
b) [tex]\frac{10^6}{5^6} : 2^3 = (\frac{10}{5})^6 : 2^3 = 2^6 : 2^3 = 2^3[/tex]
c) [tex](4^5)^7) = ((2^2)^5)^7= 2^{2*5*7} = 2^{70}[/tex]
d) [tex]\frac{1}{8} * 4^5 = 2^{-3} * (2^2)^5 = 2^{-3} * 2^{10} = 2^7[/tex]
