neg + pos = depends
neg + neg = neg;)
pos + pos = pos
neg - pos = neg + neg = neg
neg - neg = neg + pos = depends
pos - pos = pos + neg = depends
neg x pos = neg
neg x neg = pos
pos x pos = pos
neg / pos = neg x pos = neg
neg / neg = neg x neg = pos
pos / pos = pos x pos = pos
Source:2nd grade math.
Just checked from google earth, bridge still there keep posting lalay!!!