When ever you have

Just know you can bring the bottom number up top and have the exponant negative

Answer is:
![\frac{8}{ {\sqrt[7]{x^(15)}} } = 8 * \frac{1}{ {{x} }^{ (15)/(7) } } = 8 * {x}^{ - (15)/(7) }](https://img.qammunity.org/2020/formulas/mathematics/middle-school/j0h3ra8r1zdgjsm70o9x5p8sjcp083bcm7.png)
Additionally, remember the way to change expo to radical and back:
The top number on the fraction exponant is the top dog, he gets to go inside the radical, whole the bottom dog has to sleep outside the radical.