Someone has said that all the great jugglers are dead.

I was reminded of the Sydney Harris cartoon that said 'adding two numbers that have not been added before does not constitute a mathematical breakthrough'.

Someone has remarked that 'An ideal math talk should have one proof and one joke and they should not be the same'.

AB=(1/4)((A+B)2-(A-B)2) is an amazing identity, and unfortunately I have to remind my current students how to prove it.