Complex sentence: In the above, non-negative integers are shown in purple and negative integers in red.Not the natural numbers, Z is closed under he operations of addition and multiplication, that is, the sum and product of any two integers is an integer.
Split into simpler sentences: In the above, non-negative integers are shown in purple and negative integers in red. Like the natural numbers, Z is closed under the operations of addition and multiplication, that is, the sum and product of any two integers is an integer.