I am currently using KWGT and I can't find out how to do basic arithmetic. I am trying to do a subtraction of two numbers. I would presume that it would be $mu(sub, 70, $df(mm))$, but that doesn't seem to be the case. Can you help?
I don't use much math in Kustom apps, but what I advice you with codes is
You can't use the "$" sign inside a formula like you use in this code you need to use this like
$mu(sub, 70, df(mm))$
You need to put the same amount of brackets "(" to one side that to other ")"
You can't put a code inside other code with quotation marks, because the quotations print what are inside literally.
This are general advices, I think that the first apply for your code.