The Inversion Formula is a mathematical concept used in calculus and complex analysis. It provides a way to find the inverse of a function, allowing us to express the original variable in terms of the new variable. This is particularly useful when dealing with functions that are not easily invertible. In the context of complex functions, the Inversion Formula can help in transforming integrals and solving equations. It often involves the use of residue theory and contour integration to evaluate complex integrals, making it a powerful tool in both theoretical and applied mathematics.