Evaluate
 Usage
• Evaluate[expr] causes expr to be evaluated even if it appears as the argument of a function whose attributes specify that it should be held unevaluated.
Notes
• Example: Hold[Evaluate[1 + 1]]  . • You can use Evaluate to override HoldFirst, etc. attributes of built-in functions. • Evaluate only overrides HoldFirst, etc. attributes when it appears directly as the head of the function argument that would otherwise be held. • New in Version 2.
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