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Let S be the portion of the surface z=cos(y) with 0≤x≤4 and -π≤y≤π. Find the flux...

Let S be the portion of the surface z=cos(y) with 0≤x≤4 and -π≤y≤π. Find the flux of F=<e^-y,2z,xy> through S:

∫∫F*n dS

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