$\frac{168}{5}$

28

$\frac{31}{4}$

$\frac{35}{4}$

$y=x-4-2 \mathrm{e}^x$

$y=4-x-2 \mathrm{e}^x$

$y=4+x-2 \mathrm{e}^x$

$y=4-x+2 \mathrm{e}^x$

$\frac{\sqrt{34}}{3}$

$\frac{5}{3}$

$\frac{\sqrt{41}}{4}$

$\frac{5}{4}$

$y(1+x)=x+\mathrm{ce}^x$, where c is the constant of integration

$\quad y(1+x)=\mathrm{ce}^x$, where c is the constant of integration

$y(1-x)=x-\mathrm{ce}^x$, where c is the constant of integration

$y(1+x)=x$, where c is the constant of integration