HoldForm
 Usage
Notes
 Further Examples
While both Hold and HoldForm keep expressions unevaluated, Hold is shown in the output while Holdform is not.
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You can see the HoldForm with FullForm.
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This evaluates the sum of the squares of the first  positive integers.
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This displays the sum in unevaluated form.
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The function ReleaseHold removes Hold and HoldForm, allowing the expressions they contain to evaluate.
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