Dave Aronson wrote in post #1044404:
> So what's the problem?  Are you trying to say that the function isn't
> doing *anything*, not even giving you back "Invalid Math Operation"?
>
> I can believe that it is at least giving you that, rather than doing
> the proper math.  Try checking the exact value of mathop.  Put quotes
> around it.  I think you'll discover you need one more operation.  This
> shouldn't be too big a challenge to sink your teeth into.  ;-)
>
> -Dave

mathop=mathop.strip
This help Dave. Thanks for explanation

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