pi pi 2*pi 5*pi 7*pi 4*pi 5*pi 11*pi
[--, --] U [----, ----] U [----, ----] U [----, -----]
6 3 3 6 6 3 3 6
$$x\ in\ \left[\frac{\pi}{6}, \frac{\pi}{3}\right] \cup \left[\frac{2 \pi}{3}, \frac{5 \pi}{6}\right] \cup \left[\frac{7 \pi}{6}, \frac{4 \pi}{3}\right] \cup \left[\frac{5 \pi}{3}, \frac{11 \pi}{6}\right]$$
x in Union(Interval(pi/6, pi/3), Interval(2*pi/3, 5*pi/6), Interval(7*pi/6, 4*pi/3), Interval(5*pi/3, 11*pi/6))
/ /pi pi\ /2*pi 5*pi\ /7*pi 4*pi\ /5*pi 11*pi\\
Or|And|-- <= x, x <= --|, And|---- <= x, x <= ----|, And|---- <= x, x <= ----|, And|---- <= x, x <= -----||
\ \6 3 / \ 3 6 / \ 6 3 / \ 3 6 //
$$\left(\frac{\pi}{6} \leq x \wedge x \leq \frac{\pi}{3}\right) \vee \left(\frac{2 \pi}{3} \leq x \wedge x \leq \frac{5 \pi}{6}\right) \vee \left(\frac{7 \pi}{6} \leq x \wedge x \leq \frac{4 \pi}{3}\right) \vee \left(\frac{5 \pi}{3} \leq x \wedge x \leq \frac{11 \pi}{6}\right)$$
((pi/6 <= x)∧(x <= pi/3))∨((2*pi/3 <= x)∧(x <= 5*pi/6))∨((7*pi/6 <= x)∧(x <= 4*pi/3))∨((5*pi/3 <= x)∧(x <= 11*pi/6))