,SIMPLE ,FRAC;N "<,SPATIAL
     ,>RANGE;T"> ,EXAMPLES

#A4 ,"O-HALF IS WRITT5 _%

     #1
    ?33#
     #2

_:
#B4 ;X OV] ;Y IS WRITT5 _%

     ;X
    ?33#
     ;Y

_:







                              #A
#C4 ,OP5 FRAC;N ;X PLUS ;Y OV]
  ;X M9US ;Y CLOSE FRAC;N IS
  WRITT5 _%

     X+Y
    ?333#
     X-Y

_:
#D4 ,OP5 FRAC;N ;X PLUS TWO OV]
  ;X SQU>$ M9US F\R CLOSE FRAC;N
  IS WRITT5 _%

      X+2
    ?333333#
     X^2"-4

_:






                              #B
#E4 ,OP5 FRAC;N ;Y SUB TWO M9US
  ;Y SUB "O OV] ;X SUB TWO M9US
  ;X SUB "O CLOSE FRAC;N IS
  WRITT5 _%

     Y2-Y1
    ?33333#
     X2-X1

_:
#F4 ,OP5 FRAC;N ;X PLUS ;Y OV]
  OP5 P>5!SIS ;X PLUS ;Y CLOSE
  P>5!SIS OP5 P>5!SIS ;Y PLUS ;Z
  CLOSE P>5!SIS CLOSE FRAC;N
  EQUALS OP5 FRAC;N "O OV] ;Y
  PLUS ;Z IS WRITT5 _%

        X+Y          #1
    ?3333333333# .K ?333#
     (X+Y)(Y+Z)      Y+Z

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                              #C