Sqrt \[Sqrt]
Alias: sqrt. Prefix operator with built-in evaluation rules.
x is by default interpreted as Sqrt[x]. @, 2 or \@ yields a complete SqrtBox object. \[Sqrt] is equivalent when evaluated, but will not draw a line on top of the quantity whose square root is being taken. See The Mathematica Book: Section 3.10.4.
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\[Sqrt]
sqrt
@
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