ATCalc is a complex graphing calculator that can be used to visualize, and optionally copy to the Windows clipboard, all calculations, variables and results used in any operation. It also includes a programming environment to face the most difficult calculations.
ATCalc allows you to write all the calculations you want on a single line. So you can see and write, for example (12 * 3) / (4 + 2 + 8) and then check if you have typed it correctly before you start processing it. The latter is the most important difference of ATCalc compared to other programs of similar utility.
You can free download ATCalc 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.