The Formula Calculator is a tool for solving equations with variables. It prompts you to input values for the variables and then solves the equation.

The calculator can handle unlimited nested parentheses and recognizes lower/upper case letters, Greek symbols, and implied multiplication. There are standard operators including summation, product, and factorial, as well as a plus/minus operator used in formulas like the Quadratic Formula.
One useful feature of this calculator is that if a formula contains a '[+/-]' operator, it will be solved twice: once with '+' and again with '-'. You can save your formulas for future use and even organize them into groups.
All in all, the formula calculator is a reliable and efficient way to solve equations with variables.
Version 1.0: New release.