Factor out the common term \(3{x}^{3}\).
\[\frac{-3{x}^{3}(5-4{x}^{4})}{3x}\]
Move the negative sign to the left.
\[-\frac{3{x}^{3}(5-4{x}^{4})}{3x}\]
Cancel \(3\).
\[-\frac{{x}^{3}(5-4{x}^{4})}{x}\]
Simplify \(\frac{{x}^{3}(5-4{x}^{4})}{x}\) to \({x}^{2}(5-4{x}^{4})\).
\[-{x}^{2}(5-4{x}^{4})\]
-x^2*(5-4*x^4)
