Four Fours/Lemmata/Three Fours/40

Puzzle

Using exactly $3$ instances of the number $4$, the task is to write an expression for $40$, using whatever arithmetical operations you consider necessary.

Solutions

Solution $1$

$40 = \dfrac {4 \times 4} {.4}$

Solution $2$

$40 = \dfrac {4!} {\sqrt{. \dot 4} } + 4$

Also see

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