-1.5(x+y)+x(x+y)-y(x+y)+(x+y)
-1.5x-1.5y+x^2+xy-yx+y^2+x+y
x^2-1.5x+xy-yx-y+1.5y+x+y
x^2-1.5x+y-x+y
x^2-0.5x+2y