2 4*t + t > 0
t^2 + 4*t > 0
Or(And(-oo < t, t < -4), And(0 < t, t < oo))
((-oo < t)∧(t < -4))∨((0 < t)∧(t < oo))
(-oo, -4) U (0, oo)
x in Union(Interval.open(-oo, -4), Interval.open(0, oo))