mathematics - How to use 2,0,1,8 to make 51?

How to use the number 2,0,1,8 to make 51?

You can use any operation except for multiple factorials and you can concatenate numbers, ex.2,0=>20

You can take the square root of a number without a two, but if you want to take the cubic root you will need a three.

Answer

I think this is valid by your rules :

$\frac{\sqrt{\sqrt{.1^{-8}}}}{2} + 0!$
$= \frac{100}{2} + 1$
$= 51$