Simplify: (5x2−3x+2)+(2x2+7x−5)(5x^2 - 3x + 2) + (2x^2 + 7x - 5)(5x2−3x+2)+(2x2+7x−5).
7x2+4x−37x^2 + 4x - 37x2+4x−3
7x2−10x+77x^2 - 10x + 77x2−10x+7
3x2+4x+33x^2 + 4x + 33x2+4x+3
7x2+4x+37x^2 + 4x + 37x2+4x+3