Do not use formulas, only values using CData ADO.NET Provider for Excel
Connection string
This CData ADO.NET Provider for Excel connection string can be used for connections to Excel 97, Excel 2000, Excel 2002, Excel 2003, Excel 2007, Excel 2010 and Excel 2013.
Do not treat values starting with equals (=) as formulas during inserts and updates.
Excel File=C:\myExcelFile.xlsx;Allow Formula=false;