x + x + 1=
x^2 + x^2 + x =
3x^2 - 2x^2 + 5=
2x^2 + 4x - 2x + 3=
x^2 + x^2 + x + x=
9x^2 - 5x^2 + 3 + x + 1=
x^2 + 5
4x^2 + x + 4
2x + 1
2x^2 + 2x
2x^2 + 2x + 3
2x^2 + x
