A interesting case

*To*: mathgroup at smc.vnet.net*Subject*: [mg91966] A interesting case*From*: Miguel <misvrne at gmail.com>*Date*: Mon, 15 Sep 2008 03:41:40 -0400 (EDT)

I have spent work hours with this case. ToString[#,InputForm]&/@{1/a^2,2/a^2,3/a^2} {a^(-2),2/a^2,3/a^2} When the numerator of a rational element is 1, the structure string is diferent. Why?