321

$D\left(2e^x+2x\right)=2e^x+2$

$D\left(e^{3x}+e\right)=3xe^{3x}$

$D\left(\frac{e^{6x}}{3}\right)=\frac{6e^{6x}\cdot3-e^{6x}\cdot0}{3^2}=\frac{18e^{6x}}{9}=2e^{6x}$

$D\left(xe^x\right)=1\cdot e^x+x\cdot e^x=\left(1+x\right)e^x$