Use the "mixed partials" check to see if the following differential equation is exact.

if it is exact find a function f(x, y) whose differential, df(x, y) gives the differential equation. that is, level curves f(x, y) = c are solutions to the differential equation: dy/dx = (-4x^(4)-3y)/(3x+2y^(4)) first rewrite as m(x, y) dx + n(x, y) dy = 0 where m(x, y)= ?
and n(x, y)= ?

if the equation is not exact, enter not exact, otherwise enter in f(x, y) as the solution of the differential equation here ? = c.