Tractor Math

What do Tractors and Math have in common?  Little kids.We had a beautiful oak die in our back yard recently.It was home to many squirrels who barked and swatted their tails at my dog. Home to cardinals, mockingbirds, and bluejays along with other birds that we enjoyed watching.But it was right next to the house. Smack dab between my neighbor and us.It had to go.I called my most favorite...