Even numbers are multipliers of 2, so they are:
[tex]\{2,4,6,8,10,12...\}[/tex]
Since there are many infinite numbers that are negative even numbers, then we have to use:
BRACES:
[tex]\{ \}[/tex]
DIGITS:
-2 -4 -6 -8 and so on
ELLIPSIS:
[tex]\ldots[/tex]
Finally, by using those concepts we get:
[tex]\{-2,-4,-6,-8,-10,-12...\}[/tex]
That is the set of negative even numbers.