Question Number 28445 by abdo imad last updated on 25/Jan/18
$${find}\:\int\int_{{x}\leqslant{x}^{\mathrm{2}} +{y}^{\mathrm{2}} \:\leqslant\mathrm{1}} \:\:\frac{{dxdy}}{\left(\mathrm{1}+{x}^{\mathrm{2}} +{y}^{\mathrm{2}} \right)}\:\:. \\ $$
find-x-x-2-y-2-1-dxdy-1-x-2-y-2-