with (Maplets[Elements]):
maplet := 
Maplet('onstartup'='Action1','reference'='Maplet1',
	Action('reference'='clickButton1',
		Evaluate('function'='T11*(T22*T33*T44+T32*T43*T24+T42*T23*T34-T24*T33*T42-T34*T43*T22-T44*T23*T32)-T21*(T12*T33*T44+T32*T43*T14+T42*T13*T34-T14*T33*T42-T34*T43*T12-T44*T13*T32)+T31*(T12*T23*T44+T22*T43*T14+T42*T13*T24-T14*T23*T42-T24*T43*T12-T44*T13*T22)-T41*(T12*T23*T34+T22*T33*T14+T32*T13*T24-T14*T23*T32-T24*T33*T12-T34*T13*T22)',`option`="value",'target'='MathMLViewer1','waitforresult'='true')),
	Label('background'="#D6D3CE",'caption'="Matice A",'enabled'='true','foreground'="#000000",'reference'='Label1','visible'='true'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T11','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T21','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T31','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T41','visible'='true','width'='3'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout2','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxCell('hscroll'='never','value'='T11','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T21','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T31','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T41','vscroll'='never'))),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T12','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T22','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T32','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T42','visible'='true','width'='3'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout3','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxCell('hscroll'='never','value'='T12','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T22','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T32','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T42','vscroll'='never'))),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T13','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T23','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T33','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T43','visible'='true','width'='3'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout7','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxCell('hscroll'='never','value'='T13','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T23','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T33','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T43','vscroll'='never'))),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T14','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T24','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T34','visible'='true','width'='3'),
	TextField('background'="#FFFFFF",'editable'='true','enabled'='true','foreground'="#000000",'halign'='left','reference'='T44','visible'='true','width'='3'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout4','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxCell('hscroll'='never','value'='T14','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T24','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T34','vscroll'='never'),
			BoxCell('hscroll'='never','value'='T44','vscroll'='never'))),
	Button('background'="#D6D3CE",'caption'="Determinant",'enabled'='true','foreground'="#000000",'onclick'='clickButton1','reference'='Button1','visible'='true'),
	MathMLViewer('background'="#FFFFFF",'fontsize'='18','foreground'="#000000",'height'='100','reference'='MathMLViewer1','width'='300'),
	BoxLayout('background'="#D6D3CE",'border'='false','halign'='center','inset'='5','reference'='BoxLayout1','valign'='center','vertical'='false','visible'='true',
		BoxColumn(
			BoxRow(
				BoxCell('hscroll'='never','value'='Label1','vscroll'='never'),
				BoxCell('hscroll'='never','value'='BoxLayout2','vscroll'='never'),
				BoxCell('hscroll'='never','value'='BoxLayout3','vscroll'='never'),
				BoxCell('hscroll'='never','value'='BoxLayout7','vscroll'='never'),
				BoxCell('hscroll'='never','value'='BoxLayout4','vscroll'='never')),
			BoxRow(
				BoxCell('hscroll'='never','value'='Button1','vscroll'='never'),
				BoxCell('hscroll'='never','value'='MathMLViewer1','vscroll'='never')))),
	Window('layout'='BoxLayout1','reference'='Window1','resizable'='true','title'="Maplet"),
	Action('reference'='Action1',
		RunWindow('window'='Window1'))):

Maplets[Display](maplet);