Simplify: (3x2+7x−2)+(−3x2+x+5)(3x^2 + 7x - 2) + (-3x^2 + x + 5)(3x2+7x−2)+(−3x2+x+5).
8x+38x + 38x+3
8x−38x - 38x−3
6x2+8x+36x^2 + 8x + 36x2+8x+3
−6x2+8x+3-6x^2 + 8x + 3−6x2+8x+3