Procedure for the experiment is as follows.

1. Select the type of operators and the datatype you want to work upon from the top most bar.
2. You can edit the values of variables by pressing the edit button.
3. Select an expression prototype from the menu.
4. You can also edit this expression.
5. You can also edit this expression.
6. Press Next to see the step by step evaluation of the selected expression in the central panel and the corresponding reasoning in the right panel.
7. Press stop if you want to abort the experiment and start over.

Manual

Here we shall see the step by step evaluation of mathematical expressions.