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Re: Testing Mathematica Expressions?

In article <hj6qfb$8r0$1 at>,
 Andrzej Kozlowski <akozlowski at> wrote:

> > I'd be glad to spend some time perusing and attempting to understand an 
> > example (the simple the better, of course) for which
> > 
> >     ToExpression["soks"] /. ruleOne  
> > 
> > and
> > 
> >     soks /. ruleOne
> > 
> > typed into separate Input cells under identical starting conditions, 
> > where 'soks' is a sequence of key strokes, yield differing results when 
> > evaluated.

> Unevaluated[x] /. x -> 3
> Andrzej Kozlowski

You got me there.

But how about some simple expression that does not contain any 
Mathematica-unique syntax or commands -- just a sequence of input 
keystrokes that would be interpreted as a meaningful algebraic or 
mathematical expression by someone who was reasonably knowledgeable in 
math and algebra, but had never encountered Mathematica?

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