Question Number 6970 by Tawakalitu. last updated on 03/Aug/16
$${Integrate}\:\:{dz}\:=\:\left(\mathrm{8}{e}^{\mathrm{4}{x}} \:+\:\mathrm{2}{xy}^{\mathrm{2}} \right)\:{dx}\:+\:\left(\mathrm{4}{cos}\:\mathrm{4}{y}\:\:−\:\mathrm{2}{xy}\right)\:{dy} \\ $$