3 y(x) \left(2 g(x) f'(x)+5 f(x) g'(x)+6 f(x)^2 g(x)+g''(x)+3 g(x)^2\right)+y''(x) \left(4 f'(x)+11 f(x)^2+10 g(x)\right)+y'(x) \left(f''(x)+7 f(x) f'(x)+30 f(x) g(x)+6 f(x)^3+10 g'(x)\right)+6 f(x) y^{(3)}(x)+y^{(4)}(x)=0