- $ y' = \\\left( {2x + 1} \\\right){e^{{x^2} + x}}$.
- $ y' = \\\left( {x + 1} \\\right){e^{{x^2} + x}}$.
- $ y' = \\\left( {\\\frac{{{x^3}}}{3} + \\\frac{{{x^2}}}{2}} \\\right){e^{{x^2} + x}}$.
- $ y' = {e^{{x^2} + x}}$.