Answer:
[tex] \frac{ - 9 {w}^{4} + 7 {w}^{2} }{ - w} \\ \frac{{w ^{2} }( - 9 {w}^{2} + 7) }{ - w} \\ - w( - 9 {w}^{2} + 7) \\ = 9 {w}^{3} - 7w[/tex]
