Better in bed

They  have asked me to help a woman doing a maths degree at the OU
I said,I have forgotten it all
But she has cancer, they report.
I still can’t remember much except
Most numbers are transcendental
They are infinite in number yet we have only discovered a few
Pi and e are two
The other numbers also infinite in number yet are a “smaller infinity” than the first I mentioned.
As for addition and multiplication
It’s better in bed!