Why are some of my functions not working in Excel?

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1. Check that you installed the function correctly
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2. Check for errors in the function syntax
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3. Check to verify that your function has been enabled in the Excel options settings
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4. Ensure that your version of Excel supports the function
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5. Check to verify that the function is a valid argument for the cell’s data type
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6. Verify that any data field references are correctly pointing to the desired data