In a certain region for which u = 20 \mathbf{H}=5 x^{2} y z \mathbf{a}_{x}+10 x y^{2} z a_{y}-15 x y z^{2} a_{z} \mathbf{A} / \mathrm{m} How much energy is stored in 0<x< 1,0 <y <2, -1 < z < 2?

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