To perform an addition, the user must click the Addition button in the main interface and select in the drawing the texts and mtexts objects containing the numbers to be added. After selecting these objects and hitting the intro button in the keyboard, the user must indicate the point of insertion for the operation table. 

Before doing the operation, the program will show the program interface again to let the user indicate the index numbers to operate and the drawing scale.

The procedure to perform a subtraction is similar to the addition operation, except that after clicking the Subtraction button, the user must select first the text that contains the minuend and then the texts with the subtrahends. The inserted table will add a minus sign before each of the subtrahends.

The QuickCalc app can be installed by running the Quickcalc.msi file and following the instructions in the wizard. This will install the program in the following location: C:\Program Files (x86)\Autodesk\ApplicationPlugins.

To uninstall the program, execute the same Quickcalc.msi file and follow the instructions.