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- $F\left( x \right) = \frac{{{{\ln }^2}x}}{2} + 3$
- $F\left( x \right) = \frac{{{{\ln }^2}x}}{2} + 1$
- $F\left( x \right) = {\ln ^2}x + 3$
- $F\left( x \right) = \ln x + 2$