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I am needing to find the Fourier Transform of the following symbolic expression:

syms U(x,y,z) beta k

LHS = laplacian(U) + beta.^2*U

LHS_FT = fourier(LHS)

That is,

I'm needing to take the spatial 3D Fourier Transform of LHS.

This is the output I get:

LHS(x, y, z) =

LHS_FT(y, z) =

I am stuck here, any help would be much appreciated! Thank you in advance!

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