The solid region $E$ lies between the spheres $x^2+y^2+z^2=16$ and $x^2+y^2+z^2=49in$ the first

octant.

Compute the flux $of$:

$F(x,y,z)=($:$\frac{1}{\sqrt[\phantom{2}]{z^2+y^2}}arctan(\frac{x}{\sqrt[\phantom{2}]{z^2+y^2}}),16xcos(z),7xy$:$)$

across delEE flux $=$