We assume you want to simplify
[tex]\displaystyle\frac{\left(\frac{a^2a^4}{a^{-3}}\right)}{\left(\frac{a}{\left(a^2a^3\right)^4}\right)}\\\\=\frac{a^{(2+4-(-3))}}{a^{(1-4(2+3))}}=a^{(9-(-19))}\\\\=a^{28}[/tex]
The simplified expression is ... a²⁸.
