,9T]SEC;N 7OF SETS7
           ,EXAMPLES

#1_4 ,A 9T]SEC;N ;,B IS WRITT5
  ,A.%,B
#2_4 ;,C 9T]SEC;N ;,D EQUALS !
  EMPTY SET IS WRITT5
  ,C.%,D .K _0
#3_4 ,A 9T]SEC;N ;,B EQUALS !
  SET )! ELE;TS TWO & F\R IS
  WRITT5 ,A.%,B .K .(2, 4.)
#4_4 ;,C 9T]SEC;N ;,D EQUALS !
  SET ( ALL ;X S* T ;X IS AN
  ELE;T ( ;,C & ;X IS AN ELE;T (
  ;,D IS WRITT5
  ,C.%,D .K
    .(X "1 X @E ,C AND X @E ,D.)







                              #A