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Exp[-2*pi*i*(Rz+s*z)]. Integration is w.r.t z.

Where Rz is function of z, which is little complicated, but for simplicity we can assume z^3.

s is just other variable.

I was trying to do this integration in Mathematica. If I put Z instead of Z^3, then it runs otherwise it keeps running and never gives result.

Is there any other numerical integration method to perform this integration? I guess I can't do it in Simpson method, since this has complex number in it.

Any help is really appreciated.

Thanks

Veena