Error: unexpected symbol in: " data = a addOverall"

This error is likely due to a missing operator or a syntax error in the code. Without more context or information about the code, it is difficult to determine the exact cause of the error. However, here are a few possible solutions or suggestions:

- Check for any missing or misplaced operators, such as commas, parentheses, brackets, or quotation marks.
- Make sure that the code is properly formatted and indented, to help identify any syntax errors or mismatches.
- Verify that all variables and functions are properly defined and initialized before they are used.
- Consider using a code editor or IDE that provides syntax highlighting or error checking features to help identify and fix errors more easily.
- If the error persists, try to isolate the problematic code and run it separately to see if the error message provides more specific information.