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var
  m1, m2, n1, n2: Real;
  a_1_01, a_1_12, a_2_01, a_2_12: Real;
  w_1_0, w_1_1, w_1_2, w_2_0, w_2_1, w_2_2: Real;
begin
  RichEdit1.SelLength := 0;
  RichEdit1.SelStart := Length(RichEdit1.Text);
  t1 := Explode('=', Edit1.Text)[0];
  t2 := Explode('=', Edit1.Text)[1];
  Parser1.X := 0;
  Parser1.Expression := t1;
  w_1_0 := Parser1.Value;
  Parser1.X := 1;
  w_1_1 := Parser1.Value;
  Parser1.X := 2;
  w_1_2 := Parser1.Value;
  a_1_01 := w_1_1 - w_1_0;
  a_1_12 := w_1_2 - w_1_1;

  Parser1.X := 0;
  Parser1.Expression := t2;
  w_2_0 := Parser1.Value;
  Parser1.X := 1;
  w_2_1 := Parser1.Value;
  Parser1.X := 2;
  w_2_2 := Parser1.Value;
  a_2_01 := w_2_1 - w_2_0;
  a_2_12 := w_2_2 - w_2_1;

  CheckBox1.Checked := a_1_01 <> a_1_12;
  CheckBox2.Checked := a_2_01 <> a_2_12;

  Parser1.X := 0;
  Parser1.Expression := t1;
  n1 := Parser1.Value;
  Parser1.Expression := t2;
  n2 := Parser1.Value;
  Parser1.X := 5;
  Parser1.Expression := t1;
  if CheckBox1.Checked = false then
    m1 := (Parser1.Value - n1)/5
  else begin
    Parser1.X := 1;
    m1 := (Parser1.Value - 1 - n1);
  end;
  Parser1.X := 5;
  Parser1.Expression := t2;
  if CheckBox2.Checked = false then
    m2 := (Parser1.Value - n2)/5
  else begin
    Parser1.X := 1;
    m2 := (Parser1.Value - 1 - n2);
  end;