The function f(x) presents different behaviors in the following approximate input ranges:
- For x ≈ (-128, -124) or x ≈ (4, 8), f(x) ≈ -4.15
- For x ≈ (64, 68), f(x) ≈ 2.84
- For x ≈ (-100, -96) or x ≈ (-14, -6), f(x) ≈ 3.8
- For x ≈ (10, 14) or x ≈ (-130, -122), f(x) ≈ 2.84
- For x ≈ (120, 128), f(x) ≈ 0.4119

