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start learning

Question		Answer
€ start learning		belongs to
-€- start learning		doesn't belong to
n(A) start learning		number of
/0/ start learning		empty set
ACB start learning		A is a subset of B
{smth} start learning		set
AnB start learning		intersection of a set/ A and B
AuB start learning		union of a set/ at least one of...
N start learning		set of natural numbers
Z start learning		set of integers
Z+ start learning		set of positive integers
Z- start learning		set of negative integers
Q start learning		set of rational numbers
Q’ start learning		set of irrational numbers
R start learning		set of real numbers
A’ start learning		complement of a set
C_ start learning		subset or equal
AnB’ start learning		A without B (A-B)
(AuB)’ start learning		union prim
AuB - AnB start learning		A or B but not both(the union without the intersection)
AnBnC start learning		all of the [...] mentioned

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