BlueMath Calculator is a flexible desktop calculator and math expression evaluator.
BlueMath Calculator can calculate simultaneously multiple expressions, showing the results in the same time as you type.
Type the mathematical expressions in a similar way as you would write them on paper.
BlueMath Calculator Features:
multiple expressions evaluation
arithmetic operations
parentheses support for complex mathematical expressions
support for user defined variables
results can be formatted to decimal, hexadecimal and binary bases
built-in algebraic, logarithmic and trigonometric functions
built-in mathematical constants - pi, e
unlimited number of user defined variables
scientific e notation
results formatted with digit group separator
bitwise operations
enter formulas with keyboard or special extended mode keypad

The license of this software is Free Trial Software, the price is $19.00, you can free download and get a free trial.