Stop Excel errors by using these 8 key symbols, like ' to keep leading zeros and ~ to search for literal * or ? characters in data.

Use Power Query's M language to quickly fix names, remove hidden characters, extract numbers, and merge columns.

ChatGPT can assist with complex Excel formulas, including a VLOOKUP plus IFERROR to return not listed when no match appears.

Replace confusing cell references with global constants, local variables, and reusable custom functions.

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