Why is my formula unparseable?


=IFERROR(COLLECT([Completed Date] - [LTP Conversion Date], AND(IFERROR(MONTH(@cell), 0) = Feb84, IFERROR(YEAR(@cell) = 2023, 0)), {CAD Support Type TD}, ="Long Term Project")), "N/A")

The bold is what I want to subtract within the formula.


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