[AS2] Plus/minus operator

Is there any simple way to use a plus or minus operator in AS2? To give this context, lets say I want to randomize a speed, higher or lower, on event (passing a certain x or y value) (like a ball bouncing around in a bounding box, but create some random rebound angles).

I’m essentially asking if there’s anoperator for the symbol ‘±’ in AS2…

Thanks in advance!