[tex]\frac{-s^3}{2t^{3^{}}}[/tex]
Here, we want to give the answer to the division expression
We can get this by spreading out the multiplication;
[tex]\begin{gathered} \frac{-8\times s\times s\times s\times s\times t}{16\times s\times t\times t\times t\times t} \\ \\ =\text{ }\frac{-1\times s\times\times s\times s}{2\times t\times t\times t} \\ =\text{ }\frac{-s^3}{2t^{3^{}}} \end{gathered}[/tex]
