Let  $f(x)=e^{x+x^{2}}$ for real $x$ .From among the following ,choose the Taylor series approximation of $f(x)$ around $x=0$, which includes all powers of $x$ less than or equal to 3.
1. $1 + x + x^{2} + x^{3}$
2. $1 + x +\frac{3}{2} x^{2} + x^{3}$
3. $1 + x +\frac{3}{2} x^{2} + \frac{7}{6}x^{3}$
4. $1 + x +3 x^{2} + 7x^{3}$