Question Number 136400 by mathmax by abdo last updated on 21/Mar/21
![calculate ∫∫_([0,1]^2 ) e^(−(x^2 +y^2 )) arctan(x^2 +y^2 )dxdy](https://www.tinkutara.com/question/Q136400.png)
$$\mathrm{calculate}\:\:\int\int_{\left[\mathrm{0},\mathrm{1}\right]^{\mathrm{2}} } \:\:\mathrm{e}^{−\left(\mathrm{x}^{\mathrm{2}} +\mathrm{y}^{\mathrm{2}} \right)} \:\:\:\mathrm{arctan}\left(\mathrm{x}^{\mathrm{2}} \:+\mathrm{y}^{\mathrm{2}} \right)\mathrm{dxdy} \\ $$