The set of even natural numbers divisible by 3.

The set of all prime numbers divisible by 2.

The set of odd natural numbers divisible by 2.

B = {O}

C = { }

D = {x : x ∈ R, x² = -1}

E = {x : x ∈ W, 3x + 1 = 2}

P = {x : x is a prime number, 54 < x < 58}

Odd numbers which are divisible by 2

The positive integers which are less than -1

The months of the year with 28 days

The sets of counting numbers less than 0