Respuesta :

Answer:

Below:

Step-by-step explanation:

When finding the power of a power, simplify the expression by multiplying the exponents

[tex]a^{m^n} =m^m^n[/tex]

12^4^-5 = [tex]12^{4*-5[/tex][tex]=12^-20=\frac{1}{12^{20}}[/tex]

[tex](-3)^{72}[/tex]