[Help] Using Math.max to choose the highest value of three skills (Javascript)

Hey Folks, I know to use Sheet Worker Scripts to use Javascript but I'm still not very skilled in the coding Javascript. I have built my Buffy the Vampire Slayer character sheet and I'm working on adding the Sheet Rolls for the combat modifiers. I have one combat modifier that is the maximum of three skills plus 1d10. I know that Math.max is the Javascript to use but I don't know how to set it up to create an automatic calculation of the maximum of the three skills to then add in the input field. Any help is appreciated. /Matt

Use the _.max() function instead. _.max(list, [iteratee], [context]) Returns the maximum value in list. If an iteratee function is provided, it will be used on each value to generate the criterion by which the value is ranked. -Infinity is returned iflist is empty, so an isEmpty guard may be required.