(4x+3)(x+4)-(3x+5)(2x+4)+x(2x+3)
(4x+3)(x+4)-(3x-5)(2x+4)+x(2x+3)= =4x^2+16x+3x+12-(6x^2+12x-10x-20)+2x^2+3x= =4x^2+16x+3x+12-6x^2-2x+20+2x^2+3x= =20x+32