Помогите исправить ошибки.

unit Unit1;

{$mode objfpc}{$H+}

interface

uses Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics,
Dialogs, Grids, ExtCtrls, TAGraph, StdCtrls, TASeries, ComCtrls;

type

  { TForm1 }

  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Chart1: TChart;
    Edit1: TEdit;
    StringGrid1: TStringGrid;
    StringGrid2: TStringGrid;
    TrackBar1: TTrackBar;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Edit1Change(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure TrackBar1Change(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end;

var
  Form1: TForm1;
  S:TSerie;
  a,k:real;

implementation

{$R *.lfm}

{ TForm1 }
procedure func(var x,y:real);
begin
 y:=(exp(x)+exp(-x))/(exp(x)-exp(-x));
end;


procedure TForm1.TrackBar1Change(Sender: TObject);
var i:integer;
begin
i:=TrackBar1.Position;
StringGrid2.Cells[0,0]:=StringGrid1.Cells[0,i+1];
StringGrid2.Cells[1,0]:=StringGrid1.Cells[1,i+1];
StringGrid2.Cells[2,0]:=StringGrid1.Cells[2,i+1];
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
with StringGrid1 do
begin
  RowCount:=362;ColCount:=2;
  Cells[1,0]:='X';Cells[2,0]:='Y'
end;
S:=TSerie.Create(Chart1);
S.ShowLines:=True;
S.ShowPoints:=True;
S.SeriesColor:=clBlack;
Chart1.Title.Text.Text:='Гиперболический тангенс';
Chart1.Title.Visible:=true;
Chart1.Series.Clear;
Chart1.AddSerie(S);
with TrackBar1 do
begin
  Width:=Chart1.Width;
  Min:=0;Max:=360;
  Position:=0
end
end;

procedure TForm1.Button1Click(Sender: TObject);
var x,y:real;
    m:integer;
begin
val(Edit1.Text,x);
if (x=0) then
begin
 x:=1;
 Edit1.Text:='1'
end;
x:=0;y:=0;
with StringGrid1 do
for m:=1 to Rowcount-2 do
begin
  func(x,y);
  Cells[1,m+1]:=FloatToStr(x);
  Cells[2,m+1]:=FloatToStr(y)
end;
StringGrid1.SetFocus
end;

procedure TForm1.Button2Click(Sender: TObject);
var i:integer;
begin
S.Clear;
with StringGrid1 do for i:=1 to Rowcount-1 do
S.AddXY(StrToFloat(Cells[1,i]),
StrToFloat(Cells[2,i]),IntToStr(i),clBlack);
TrackBar1.Width:=Chart1.Width;
StringGrid1.SetFocus

end;


end.