$\frac{ 4{w}^{2}{y}^{3} \times \left( 4{w}^{3}{y}^{8}+7{y}^{2}-9w \right) }{ 4{w}^{3}{y}^{3} }$
Cancel out the common factor $4$$\frac{ {w}^{2}{y}^{3} \times \left( 4{w}^{3}{y}^{8}+7{y}^{2}-9w \right) }{ {w}^{3}{y}^{3} }$
Cancel out the common factor ${y}^{3}$$\frac{ {w}^{2} \times \left( 4{w}^{3}{y}^{8}+7{y}^{2}-9w \right) }{ {w}^{3} }$
Simplify the expression$\frac{ 4{w}^{3}{y}^{8}+7{y}^{2}-9w }{ w }$