Which polynomial is in standard form (descending powers)?
3+2x−x23 + 2x - x^23+2x−x2
−x2+2x+3-x^2 + 2x + 3−x2+2x+3
2x+3−x22x + 3 - x^22x+3−x2
−x2−2x+3-x^2 - 2x + 3−x2−2x+3