$\int \frac{(1+x) e^{x} d x}{\cos ^{2}\left(x e^{x}\right)}=?$

$\sin e^{x}+c$

$\tan \left(x e^{x}\right)+c$

$\cos \left(x e^{x}\right)+c$

$\cot \left(x e^{x}\right)+c$