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  • SqrtBox[ x ] represents in input and output.
  • Inside \( ... \) SqrtBox[ x ] can be input as \@ x.
  • In a notebook a SqrtBox can be created using 2 or @. moves out from under the square root sign.
  • In StandardForm and InputForm, SqrtBox[ x ] is interpreted on input as Sqrt[ x ].
  • The baseline of SqrtBox[ x ] is taken to be the baseline of x.
  • If SqrtBox[ x ] does not fit on a single line, it is output as x ^(1/2).
  • In StandardForm, explicit SqrtBox objects are output literally. You can use DisplayForm to see the display form of such objects.
  • See the Mathematica book: Section 2.8.10.
  • See also: RadicalBox, OverscriptBox.