/ /pi 7*pi\ /5*pi 11*pi\\
Or|And|-- <= x, x <= ----|, And|---- <= x, x <= -----||
\ \3 6 / \ 3 6 //
$$\left(\frac{\pi}{3} \leq x \wedge x \leq \frac{7 \pi}{6}\right) \vee \left(\frac{5 \pi}{3} \leq x \wedge x \leq \frac{11 \pi}{6}\right)$$
((pi/3 <= x)∧(x <= 7*pi/6))∨((5*pi/3 <= x)∧(x <= 11*pi/6))
pi 7*pi 5*pi 11*pi
[--, ----] U [----, -----]
3 6 3 6
$$x\ in\ \left[\frac{\pi}{3}, \frac{7 \pi}{6}\right] \cup \left[\frac{5 \pi}{3}, \frac{11 \pi}{6}\right]$$
x in Union(Interval(pi/3, 7*pi/6), Interval(5*pi/3, 11*pi/6))