The differential equation is
y = esin\((\frac{d^3y}{dx^3})^2+(\frac{dy}{dx})^4\)
Highest order derivative is \(\frac{d^3y}{dx^3}\)
But differential equation is not a polynomial equation in derivative of y.
∴ Degree is not defined
Order = Order of highest order derivative=3
Hence, order of differential equation is 3 but degree is not defined.