Or(And(-2/5 < x, x < 4/5), And(4/5 < x, x < oo), x < -2/5)
$$\left(- \frac{2}{5} < x \wedge x < \frac{4}{5}\right) \vee \left(\frac{4}{5} < x \wedge x < \infty\right) \vee x < - \frac{2}{5}$$
(x < -2/5)∨((-2/5 < x)∧(x < 4/5))∨((4/5 < x)∧(x < oo))
(-oo, -2/5) U (-2/5, 4/5) U (4/5, oo)
$$x\ in\ \left(-\infty, - \frac{2}{5}\right) \cup \left(- \frac{2}{5}, \frac{4}{5}\right) \cup \left(\frac{4}{5}, \infty\right)$$
x in Union(Interval.open(-oo, -2/5), Interval.open(-2/5, 4/5), Interval.open(4/5, oo))