The document provides an overview of formulas and functions in Microsoft Excel 2016. It defines formulas as sequences of values, cell references, names, functions or operators that produce a new value using an equal sign. Functions are prewritten formulas that perform operations and return values. The document describes common functions like SUM, AVERAGE, MAX, MIN, as well as date/time functions. It explains concepts like arguments, ranges, arrays, operators and cell references used in formulas.