[Tutor] a puzzle about -3**2 vs (-3)**2

[D Wyatt]

<snip>
>
> This matches the precedence rules for written mathematics, where negation
> has a lower precedence than exponentiation as well.  So python is doing the
> correct thing here mathematically.  See, for example,
> http://mathforum.org/library/drmath/view/53194.html
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That is just so counterintuitive, and I've never run into this in any
mathematics I have taken.  Now I'm going to have to research this
further, from a mathematics standpoint.
-- 
Deb Wyatt in WA