Calculus
/ˈkæl.kjʊ.ləs/
noun
Calculation; computation.
Any formal system in which symbolic expressions are manipulated according to fixed rules.
“lambda calculus”
(often definite, the calculus) Differential calculus and integral calculus considered as a single subject; analysis.
Synonyms: ciphering, reckoning, infinitesimal calculus, dental calculus, tartar, stone