t's a bullet fired from a sniper rifle! Fired at a distance of about 100 meters, it has enough power to pierce through a steel plate!Is this person, a human or a ghost!The sniper broke out in a cold s....""Name a few formulas, and I can do them too! I'm good at math!""The hardest part of this problem is proving the theorem at the end. The beginning is fine, many people can do it... Just watch, Fang Y...