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