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

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

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

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

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