/ / pi\ / 3*pi \ /pi 5*pi\\
Or|And|0 <= x, x < --|, And|x <= 2*pi, ---- < x|, And|-- < x, x < ----||
\ \ 6 / \ 2 / \2 6 //
$$\left(0 \leq x \wedge x < \frac{\pi}{6}\right) \vee \left(x \leq 2 \pi \wedge \frac{3 \pi}{2} < x\right) \vee \left(\frac{\pi}{2} < x \wedge x < \frac{5 \pi}{6}\right)$$
((0 <= x)∧(x < pi/6))∨((x <= 2*pi)∧(3*pi/2 < x))∨((pi/2 < x)∧(x < 5*pi/6))
pi pi 5*pi 3*pi
[0, --) U (--, ----) U (----, 2*pi]
6 2 6 2
$$x\ in\ \left[0, \frac{\pi}{6}\right) \cup \left(\frac{\pi}{2}, \frac{5 \pi}{6}\right) \cup \left(\frac{3 \pi}{2}, 2 \pi\right]$$
x in Union(Interval.Ropen(0, pi/6), Interval.open(pi/2, 5*pi/6), Interval.Lopen(3*pi/2, 2*pi))