CalcExpress will calculate a formula via hotkey or tray icon. A hotkey or a click on a tray icon starts the calculation dialog for your math formula. The dialog is generated out of the formula. Just enter the actual parameters and it displays the result. It displays a small graph when a range is input; displays a table when a two ranges are input; rounds to the number of digits specified; and memorizes the last variable input and the position of the dialog.