Question

a^-4*(a^-5)^4/(a^3)^ -4 при a= 4V5

Answer 1

$\frac{a^{-4}*(a^{-5})^{4}}{(a^{3})^{-4}}=\frac{a^{-4}*a^{-20}}{a^{-12}}=a^{-4-20+12}=a^{-12}$