Question Number 27185 by abdo imad last updated on 02/Jan/18
$${find}\:\:\int\int_{{D}} \left({x}+{y}\right)^{\mathrm{2}} \:{e}^{{x}^{\mathrm{2}} −{y}^{\mathrm{2}} } {dxdy}\:{with} \\ $$$${D}=\left\{\left({x},{y}\right)\in{R}^{\mathrm{2}\:} /\mathrm{0}<{x}<\mathrm{1}\:{and}\:\mathrm{0}<{y}<\mathrm{1}−{x}\:\right\}. \\ $$