This calculator software allows for mathematical expressions to be evaluated, including functions and brackets. It also allows for the usage of predefined variables. Perfect for basic and complex calculations.

The edit box 'Expression' is where the user inputs the mathematical expression they want calculated. This expression can contain various elements such as numbers that may or may not have a decimal point or a power of 10 (e.g. 1.2e-2 or 3.E3), as well as mathematical operations like +, -, *, and /, and the power of grade operation (^) which is used to raise one number to the power of another. The use of brackets is highly recommended to determine the order of operation execution.
Furthermore, this calculator also supports a wide range of elementary mathematical functions such as sin, cos, tan, asin, acos, atan, ln, log10, exp, pow10, abs, and sqrt. In addition, it also has basic statistical functions like sum, mean, sigma (standard deviation), student, and trust that can be used for calculating probability and trust interval. It's important to note that arguments of the functions have to be an expression surrounded by brackets.
Users can declare and edit variables separately from the formula, which can be any combination of letters and numbers without spaces or reserved words. In most cases, value expressions are numbers, but they can also be mathematical expressions too.
Overall, this calculator is a comprehensive tool for anyone looking to evaluate complex mathematical expressions.
Version 4.1: Small bags are fixed.