I had a nice instant message conversation with Donna.
I tried to figure out the difference between two cubes with the formula
a**3 - b**3 = (a - b) (a**2 + ab + b**2)
By mid-afternoon, I was feeling very lethargic and achy.
I checked in with Robert by phone on the way home. He was having a horrendous work day.
Once home, I went right to bed.