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....example, suppose cell D4 has formula =Sum(A1:A2) and its value is...: IsNumeric ; Value : ---; Formula := SUM ( A1 : A2 )] Find cells...