Unevaluated
 Usage
• Unevaluated[expr] represents the unevaluated form of expr when it appears as the argument to a function.
Notes
• f[Unevaluated[expr]] effectively works by temporarily setting attributes so that f holds its argument unevaluated, then evaluating f[expr]. • Example: Length[Unevaluated[5+6]]  . • New in Version 2.
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