ℜ,[−1,∞)\Re,[-1, \infty)ℜ,[−1,∞)
(−∞,0],(−∞,2](-\infty, 0],(-\infty, 2](−∞,0],(−∞,2]
(−1,∞),[0,1](-1, \infty),[0,1](−1,∞),[0,1]
ℜ,[−1,0]\Re,[-1,0]ℜ,[−1,0]