The truly exhausting part of driving for Uber is constantly doing the math.

Since I started driving for Uber, I've noticed that many people only look at the gross earnings, not what's left at the end of the day. Before heading out in the morning, I check gas prices, then the tires, brakes, and insurance. A $18 trip on the app looks good, but in reality, you might spend forty minutes in traffic and return empty-handed. Airport trips are a bit better, but you have to…