Calculating a Max Value

I'm trying to format conditional logic to determine the highest value in 4 fields, and return that highest value to a 5th field. Instead, it's putting all the values in the 5th field.  Screenshot below.

For example, if my 4 fields have 0, 3, 5, 7, the logic is returning 3057 instead of choosing the highest value of the 4 (7).

Thanks!

Please make sure to separate the fields with a comma. You may check this guide regarding math functions: https://www.jotform.com/help/267-Form-Calculation-Math-Function-Reference 

Thank you.  I added the commas, but it still isn't working correctly.  Any other suggestions?

Your comma in the calculation is in the text format, brown background. I've fixed it to dark, numeric. Can you check now? I tried checking this, but I'm confused as to what options to choose. You have multiple conditions in the form. Can you guide us? Maybe a short video of what fields to choose. 

That's pretty tricky! I've updated my formulas to have the dark commas, and that has fixed the problems.  And yes, it does have a lot of conditions, haha. Thank you!