A *cow*culater. I made it up myself, so don't groan at the pun.
Nothing he just waved. Sea what I did there? Sorry sometimes I get a bit carried away, it like a tsunami of puns. Water these puns! they're horrible, I'll stop now.
Poo
Someone who solves a problem you didn't know you had in a way you don't understand.
He solved for y! Thought this one up myself and thought it was post worthy
An ironing board.
A groan up!
Math problems actually exist
They're all, like, equal to me...