Answer:
![5^4\\](https://img.qammunity.org/2021/formulas/mathematics/high-school/nhxrftuqni0sopbyw8xacyf02m4x1qbemc.png)
Explanation:
Recall that exponents are a convention used to simplify the writing of expressions that involve the multiplication of a repeated factor by using as the base of the exponent the factor that is multiplied, and for the exponent the number of times the actor appears:
![a\,*\,a\,*\,a\,*\,a=a^4](https://img.qammunity.org/2021/formulas/mathematics/high-school/lr0j1d238q6hrx4h081j1tmxonmwb5kca0.png)
so in your case, the base (repeated factor) is 5, and the exponent (number of appearances of the factor 5 is 4:
![5*5*5*5=5^4](https://img.qammunity.org/2021/formulas/mathematics/high-school/j04w93bqxf2hz2f4inga8itk2fidmjwfyt.png)