How a can restar all my variables of some "Formula nodes"?

I have one formula node with several outputs,
I want restar one of her value to 0 when one sentence is false o is true.

I am not quite sure what you are wanting to know. I suspect that you want to be able to write if-then statements (conditional ) in the formula node. The best place for this kind of information is to right click on the boarder of the formual node >> help.
I dug around for a few seconds and found the following cryptic information:
The numeric value of TRUE is 1, and FALSE is 0 for output. The logical value of 0 is FALSE, and any non-zero number is TRUE. The logical value of the conditional expression
is if the logical value of is TRUE and otherwise.
I think this means if is true then do otherwise do
There is an example that might be more helpful. Open LabVIEW >>
help >> find examples >> click on search tab >> look for formula >> open calculate volume.vi .

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