Question Number 31078 by abdo imad last updated on 02/Mar/18
$${find}\:\int\int_{\mathrm{0}\leqslant{x}\leqslant\mathrm{3}\:{and}\:{x}\leqslant{y}\leqslant\mathrm{4}{x}−{x}^{\mathrm{2}} } \:\:\:\left({x}^{\mathrm{2}} \:+\mathrm{2}{y}\right){dxdy}. \\ $$