THe problem is:
[tex]\frac{-5h^3+15h}{5h}[/tex]We divide each of the 2 terms of the numerator by the denominator as shown:
[tex]\begin{gathered} \frac{-5h^3+15h}{5h} \\ =\frac{-5h^3}{5h}+\frac{15h}{5h} \end{gathered}[/tex]We cross out h's and the 5's to get:
[tex]\begin{gathered} \frac{-5h^3}{5h}+\frac{15h}{5h} \\ =-h^2+3 \end{gathered}[/tex]This is final answer.