Simplify: (4x2+3x−1)+(x2−3x+1)(4x^2 + 3x - 1) + (x^2 - 3x + 1)(4x2+3x−1)+(x2−3x+1).
5x2+6x5x^2 + 6x5x2+6x
5x25x^25x2
5x2−25x^2 - 25x2−2
3x2+6x−23x^2 + 6x - 23x2+6x−2