Although not required for basic addition, Excel has the SUM function, which can simplify adding large ranges of numbers.Instead of typing out each individual cell reference, you can use =SUM(A1:A3 ...

Nature - Conjugate Functions for Engineers: a Simple Exposition of the Schwarz-Christoffel Transformation applied to the Solution of Problems involving Two-Dimensional Fields of Force and Flux.

Basic arithmetic. The most basic functions in Calc are simple arithmetic: Addition, subtraction, multiplication, and division (or, as Alice in Wonderland calls them, Ambition, Distraction, ...