- $ F\\\left( x \\\right) = 3{x^2} + 3x + C$.
- $ F\\\left( x \\\right) = \\\frac{{{x^4}}}{4} + \\\frac{{{x^2}}}{2} + 2x + C$.
- $ F\\\left( x \\\right) = \\\frac{{{x^4}}}{3} + 3{x^2} + 2x + C$.
- $ F\\\left( x \\\right) = \\\frac{{{x^4}}}{4} + \\\frac{{3{x^2}}}{2} + 2x + C$.