ones eletro-magnétiques exponencials

m·d_{tt}^{2}[x(t)] = k·pq·( (e^{ln(a)·x}+(-1))/x )+(-1)·( (e^{ln(a)·(d_{t}[x]·t)}+(-1))/(d_{t}[x]·t) )


x(t) = Vt