,D]IVATIVE ( ;Y ) ,RESPECT
        TO ;X ,EXAMPLES

#A4 ,! D]IVATIVE ( ;Y ) RESPECT
  TO ;X : IS REPRES5T$ BY OP5
  FRAC;N DY OV] DX CLOSE FRAC;N
  IS WRITT5 _% ?DY/DX# _:
#B4 ,OP5 FRAC;N DY OV] DX CLOSE
  FRAC;N EQUALS TWO ;X PLUS F\R
  IS WRITT5
  _% ?DY/DX# .K #2X+4 _:
#C4 ,! SECOND D]IVATIVE ( ;Y )
  RESPECT TO ;X : IS REPRES5T$
  BY OP5 FRAC;N ;D SQU>$ ;Y OV]
  DX SQU>$ CLOSE FRAC;N IS
  WRITT5 _% ?D^2"Y/DX^2"# _:
#D4 ,! N? D]IVATIVE ( ;Y )
  RESPECT TO ;X : IS REPRES5T$
  BY OP5 FRAC;N ;D TO ! N? P[]
  ;Y OV] DX TO ! N? P[] CLOSE
  FRAC;N IS WRITT5
  _% ?D^N"Y/DX^N"# _:


                              #A