Which of the following function is not surjective?

$\mathrm{f}:(-1,1)\to \left(\frac{{\displaystyle -\mathrm{\pi }}}{{\displaystyle 2}},\frac{{\displaystyle \mathrm{\pi }}}{{\displaystyle 2}}\right);\mathrm{f}\left(\mathrm{x}\right)={\tan }^{-1}\frac{2\mathrm{x}}{1-{\mathrm{x}}^2}$

$\mathrm{f}:\mathrm{R}-\left\{1\right\}\to \mathrm{R}-\left\{1\right\};\mathrm{f}\left(\mathrm{x}\right)=\frac{\mathrm{x}}{\mathrm{x}-1}$

$\mathrm{f}:[0,\mathrm{\infty })\to (0,1);\mathrm{f}\left(\mathrm{x}\right)={\mathrm{e}}^{-\left|\mathrm{x}\right|}$

$\mathrm{f}:\mathrm{R}\to \mathrm{R};\mathrm{f}\left(\mathrm{x}\right)={\mathrm{x}}^3-{\mathrm{x}}^2+\mathrm{x}$