title: How to insert Excel formula to cell in Report Builder 3.0?
body: <p>There is RDL report template for SQL Server Reporting Services.<br>
  I need to set value for cell in table in the report template which must be calculated from other values in the report.<br>
  When the report is exported to Excel file I need to see the Excel formula in that cell.</p>
  
  <p>Example:</p>
  
  <p>1) Sample report template with three columns table. First cell must be sum of second and third:
  <img src="https://i.stack.imgur.com/LR1Be.png" alt="step 1"></p>
  
  <p>2) I set expression for first column to reproduce excel formula in output report:</p>
  
  <p><img src="https://i.stack.imgur.com/dsJcr.png" alt="step 2"></p>
  
  <p>3) When report was exported to Excel file I see raw text of formula in cell:
  <img src="https://i.stack.imgur.com/WIUxR.png" alt="step 3">
  4) But when I click on value in excel formula input cell converted to right value:
  <img src="https://i.stack.imgur.com/wRwW4.png" alt="step 4"></p>