(∫_0^∞)(∫_0^∞)(x^2) (y^2) ((1/x)+(1/y)-1) exp(-2 (x+y))\[DifferentialD]y\[DifferentialD]x

(∫_0^∞)(∫_0^∞)(x^2) (y^2) ((1/x)+(1/y)) exp(-2 (x+y))\[DifferentialD]y\[DifferentialD]x