The domain of the function appears to be the entire real number line. However, there may be an interval where the function displays unexpected behavior. Let's further investigate to determine the bounds and characteristics of this interval.

To find the interval of unexpected behavior, we can test more input values within a specific range. Let's test the function with inputs ranging from -128 to 128.

COMMAND: PYTHON(./temp2/function.py -128 -64 -32 -16 -8 -4 -2 -1 0 1 2 4 8 16 32 64 128)