f(x) = ||x + 1| - |x + 3||
(34, 2)
(92, 2)
(-100, 2)
(12, 2)
(80, 2)
(4, 2)
(70, 2)
(-82, 2)
(90, 2)
(-14, 2)
(-78, 2)
(-90, 2)
(-46, 2)
(-48, 2)
(46, 2)
(66, 2)
(22, 2)
(72, 2)
(-66, 2)
(-4, 2)
(82, 2)
(98, 2)
(74, 2)
(36, 2)
(-70, 2)
(-54, 2)
(-74, 2)
(-30, 2)
(-32, 2)
(-12, 2)
(52, 2)
(32, 2)
(-60, 2)
(-20, 2)
(40, 2)
(68, 2)
(-86, 2)
(-34, 2)
(24, 2)
(-10, 2)
(18, 2)
(-44, 2)
(62, 2)
(-76, 2)
(50, 2)
(-2, 0)
(88, 2)
(10, 2)
(-94, 2)
(-56, 2)
(-52, 2)
(0, 2)
(-80, 2)
(-36, 2)
(78, 2)
(54, 2)
(60, 2)
(-64, 2)
(-40, 2)
(-68, 2)
(26, 2)
(28, 2)
(-38, 2)
(-42, 2)
(-22, 2)
(-84, 2)
(-50, 2)
(38, 2)
(64, 2)
(30, 2)
(14, 2)
(86, 2)
(-6, 2)
(-98, 2)
(-28, 2)
(6, 2)
(-18, 2)
(94, 2)
(48, 2)
(16, 2)
(20, 2)
(2, 2)
(96, 2)
(-26, 2)
(-92, 2)
(-96, 2)
(-8, 2)
(58, 2)
(76, 2)
(-88, 2)
(8, 2)
(-16, 2)
(100, 2)
(-24, 2)
(42, 2)
(84, 2)
(-62, 2)
(56, 2)
(-58, 2)
(-72, 2)
(44, 2)
[-2, oo)
(-oo, -2]