Why are you senile?

You're such a nice man.

Your intellect flows,

but not into our hands.

From one minute to the next,

You're not always here,

all the numbers are there,

all the postulates and theorems,

but you call on those who aren't even there.

It's my third time up at the board in a row, 

though you didn't mark me present.

You've go knowlege to present,

but sadly,

it's all just jumbled numbers.