[0,∞),(0,1][0, \infty),(0,1][0,∞),(0,1]
[2,∞),(0,∞][2, \infty),(0, \infty][2,∞),(0,∞]
[0,∞),(0,∞][0, \infty),(0, \infty][0,∞),(0,∞]
[2,∞),[0,∞)[2, \infty),[0, \infty)[2,∞),[0,∞)