👉 Counterformula is a mathematical notation used in combinatorics and algebra to denote a formula that can be derived by repeatedly applying a given function or rule. It is often used to simplify or simplify a complicated expression involving functions, such as polynomials or sums. For example, consider the following polynomial: \[ P(x) = x^2 + 3x - 7 \] We could write it using a counterformula as follows: \[ \sum_{k=0}^{n-
