(x+2)^2 -(x+1)( x-5)=x^2+4x+4-x^2+4x+5=8x+9=19/3
(x+3)^2-(x+2)(x-2)-2x^2=x^2+6x+9-x^2+4-2x^2=-2x^2+6x+13=97/9