____ ____
1 2*\/ 31 1 2*\/ 31
(- - - --------, -4] U [1, - - + --------)
3 3 3 3
$$x\ in\ \left(- \frac{2 \sqrt{31}}{3} - \frac{1}{3}, -4\right] \cup \left[1, - \frac{1}{3} + \frac{2 \sqrt{31}}{3}\right)$$
x in Union(Interval.Ropen(1, -1/3 + 2*sqrt(31)/3), Interval.Lopen(-2*sqrt(31)/3 - 1/3, -4))
/ / ____\ / ____ \\
| | 1 2*\/ 31 | | 1 2*\/ 31 ||
Or|And|1 <= x, x < - - + --------|, And|x <= -4, - - - -------- < x||
\ \ 3 3 / \ 3 3 //
$$\left(1 \leq x \wedge x < - \frac{1}{3} + \frac{2 \sqrt{31}}{3}\right) \vee \left(x \leq -4 \wedge - \frac{2 \sqrt{31}}{3} - \frac{1}{3} < x\right)$$
((1 <= x)∧(x < -1/3 + 2*sqrt(31)/3))∨((x <= -4)∧(-1/3 - 2*sqrt(31)/3 < x))