extracting coefficients of e^ix from polynomial

Hi everyone,

I am trying to extract the coefficients of e^ix from a polynomial. My attempts using the coeffs, e^ix command have been unsuccessfull and I am wondering if anyone has another solution.

So, i have a function like: y= (2+5k)e^ix + 7e^2ix + (2+9a)e^-ix

and want MathCAD to give me: coeffs(y) = (  2+9a;  2+5k; 7).

Another example is in the attached file

Thanks for your replies!