Four Fours/72

Puzzle

Using exactly $4$ instances of the number $4$, the task is to write an expression for $72$, using whatever arithmetical operations you consider necessary.

Solutions

Solution $1$

$72 = 4! \times \paren {4 - \dfrac 4 4}$

Solution $2$

$72 = \dfrac {4! + 4} {.4} + \sqrt 4$

Also see

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