The problem is

y+(x+2xy^2)dy/dx=0

I’m trying to find an integrating factor to make this exact. To get the integrating factor “u”:

du/dy=u[(Nx-My)/M ]= u(1+2y2-1)/y=2y*u

u=e^(2y)

If I multiply it by My and Nx, they don't equal.

Then my equation still isn’t exact. What did I do wrong? I feel like I’ve been over this 20 times already.