TeX source:

\quad \frac{d}{d x}\left(\sin \left(4 x+e^{x}\right)\right)=\cos \left(4 x+e^{x}\right) \cdot D\left(4 x+e^{x}\right)=\cos \left(4 x+e^{x}\right) \cdot\left(4+e^{x}\right)