This word was originally derived by Dr. Shih from the ancient neanderthalian root words Cal - Kar- Oos, meaning "Out of sync shit carburetor carburetor". However, today the meaning of the word is thought to resemble that of calculus.
"Class, today we have to dou two homeworks tree and four. We no need to get behind for the Calkurus exam May. Homeworks quiz tomorrow on one and too"