Comment #1 on issue 2359 by [email protected]: Should Pow(expr, S(1)/2) print as sqrt(expr)
http://code.google.com/p/sympy/issues/detail?id=2359
It's indeed annoying. What about sqrt(sqrt(x)) and other? We can specialcase sqrt(x) but for other cases we have to decide between x**Rational(p, q) and x**(S(p)/q).
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