Chapter 2.6, Problem 19P

Integrating Factor. In each of Problem $19$ through $22$:

Show that the given equation is not exact but becomesexact when multiplied by the given integrating factor.

Solve the equation.

Use a computer to draw several integral curves.

$x^2{y}^3+x\left(1+y^2\right)y\text{'}=0,\mu (x,y)=\frac{1}{x{y}^3}$.