Question Number 158696 by mkam last updated on 07/Nov/21
$${find}\:{the}\:{partial}\:{differention}\:{equation}\:{if}\: \\ $$$${u}\:=\:\left({g}\:{o}\:{f}\:\right)\:\left({x}+{y}\right) \\ $$$$ \\ $$$${help}\:{me}\:{sir} \\ $$
find-the-partial-differention-equation-if-u-g-o-f-x-y-help-me-sir-