... Font("courier", 1 4)) ], [Label("Y(x)", 'font' = Font("courier", 1 4)) , TextField['f'](width = 40, "D(D(y ) )( x)-2*D(y)(x)+2*y(x)=4*exp(x) " ;)] , ... Maplets[Tools][Set ](( 'ketqua&apos ; )( value) = Rank(A )) fi: end : Dinhthuc := proc () if t = 0 then Thongbao () else Maplets[Tools][Set ](( 'ketqua&apos ; )( value) = Determinant(A )) fi: end: DTDT := proc () if t ... Button("Animate",Evaluate('function'='VanDong(f,g,SL1,d)&apos ;)) , [Button("Back",CloseWindow('Plot&apos ;)) ], Button("Exit",onclick=A 3)] )] ]), Action[A1](RunWindow(Plot )) , Window[Plot2 ](& quot;Do thi...