$\begin{array}{1 1} \sqrt 7 x^2+\frac{1}{6}x +2 \\ \frac{7}{\sqrt 2} x^2+\frac{1}{6}x +2 \\ \frac{7}{\sqrt 2} x^2+\frac{1}{6}x \\ \sqrt 7 x^2+2 \end{array} $