Those keys are good not only for typing in mathematical operators, but also for shortcuts. They must emit different keycodes from the ones one the main keyboard

Those keys are good not only for typing in mathematical operators, but also for shortcuts. They must emit different keycodes from the ones one the main keyboard, and you don't need shift. I don't know how to do Shift+ or Control+ without them. Maybe I should finally switch to Linux. There, you don't even need F keys in the terminal ;-)