Вычислить значение функции F(x, y) для случайных значений аргументов x и y

unit MainU;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;
 
type
  TForm1 = class(TForm)
    Button1: TButton;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
uses
math;
 
procedure TForm1.Button1Click(Sender: TObject);
var
x,y:integer;
f:extended;
begin
randomize;
x:=random(46)-25;
label2.Caption:=floattostr(x);
y:=random(46)-25;
label4.Caption:=floattostr(y);
if x<-5 then
f:=(sqr(x)+ln(abs(y)))/(sqrt(abs(x))+10)
else if x>3 then
f:=abs(ln(abs(y))-sqr(ln(x)))/pi
else
f:=y+power(cos(x),3);
label6.Caption:=floattostr(f);
end;
 
procedure TForm1.Button2Click(Sender: TObject);
begin
close;
end;
 
procedure TForm1.FormCreate(Sender: TObject);
begin
button1click(sender);
end;
 
end.