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Formula AST Lab

Excel Formula Debugger & Explainer

Paste any Excel formula to automatically detect syntax errors, unclosed parentheses, and illegal function parameters with step-by-step guidance.

Try standard bug patterns:

Issue Detected

Diagnosis: UNCLOSED_PARENTHESIS

Formula has 1 unclosed parenthesis '('. Make sure all opened functions are closed.

Suggested Correction:
=SUM(A1:A10, AVERAGE(B1:B10))
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