-y^{(4)}(x) (x (a A(5)-A(4))+A(5))-y^{(3)}(x) (x (a A(4)-A(3))+A(4))-(x (a A(3)-A(2))+A(3)) y''(x)-(x (a A(2)-A(1))+A(2)) y'(x)-x (a A(1)-A(0))-A(1)+x y^{(5)}(x)=0