Math problems actually exist
Astro-knots.
Omega!! Note: surely it already exists but I thought of it independently and am proud of my terrible joke!
With a cow-culator! (Rimshot)
He solved for y! Thought this one up myself and thought it was post worthy
It slit.
A math problem.
I woun't pay a 100 bucks for a Gorbanzo bean on my face.