Question: Substitution considering Fourier transform

Hi all

How can I realize the following code in maple:

 EquCon := K[4]*(diff(W(x), x, x, x, x))-omega^2*W(x)

EquConFour := subs((1/2)*(int(W(kappa)*exp^(-J*kappa*x), kappa = -infinity .. infinity))/Pi, EquControl)

 

Thanks~

 

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