BPT.pdf (application/pdf Object) Calculus Video Tutorials. One Hundred Interesting Mathematical Calculations, Number 7: Archive Entry From Brad DeLong's Webjournal. One Hundred Interesting Mathematical Calculations, Number 7 One Hundred Interesting Mathematical Calculations, Number 7: Julius Caesar's Last Breath What's the chance that the breath you just inhaled contains at least one air molecule that was in Julius Caesar's last breath--the one in which he said (according to Shakespeare) " Et tu Brute ?