The function f(x) mostly returns 0 for values outside the interval -4 ≤ x ≤ 4. Within this interval, it behaves differently with the following results:

- For -4 ≤ x < 0, f(x) = 7.2
- For x = 0, f(x) ≈ 134.46
- For 0 < x ≤ 4, f(x) = 19.8

