Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....Value = 3 ; //Adding a SUM formula to "A4" cell cell = cells [...[ "A4" ]; cell . Formula = "=SUM(A1:A3)" ; //Calculating the...