I investigated my system and encountered differential equation such as

$y''(x) = e^{y(x)}-e^{-2y(x)}-e^{y(x)-y(x+d)}$,

where $d$ is a constant. The boundary condition is 

$y'(0) = 30$

$y'(\infty)=0$.

I want to implement this in mathematica using `NDSolve`. Can anyone guide me as I am new to Mathematica?