ecuació diferencial de producte integral invers

d_{xx}^{2}[ f(g(x)) [o(x)o] g(x)^{[o(x)o](-1)} ]  = (x^{m_{1}}+...(n)...+x^{m_{n}})·f(g(x))


f(g(x)) = e^{g(x)}
g(x) = int[ x^{n_{1}}+...(n)...+x^{m_{n}} ]d[x]