Let

$$

$$be the language given by

$$

$=$

$\{$

w

i

n

$\{$

$$

$,$

$$

$,$

$$

$\}$

$*$

$*$

$|$

$|$

$$

$|$

$$

$=$

$1$

$$or

$|$

$$

$|$

$$

$=$

$2$

$,$

$$and every

$$

$$is preceded and

$/$

or followed by a

$\{$

:

$$

$\}$

Give a regular expression for the language

$$

$$and explain your answer.