If we assume the function is p(e)=((e^e+e^-e)/(e^e-e^e)-1)/e, then p approaches 0 as e approaches e from the positive side. The reason is that the numerator is: e^e+e^-e-e^e+e^-e=2e^-e with e as the denominator, making p(e)=2e^-2e or 2/e^2e. When e is very small p(e)=0 because e^2e is very large so its reciprocal is very small.