Simplify: 7x2−3x+2x2−x+57x^2 - 3x + 2x^2 - x + 57x2−3x+2x2−x+5.
9x2−4x+59x^2 - 4x + 59x2−4x+5
9x2+4x+59x^2 + 4x + 59x2+4x+5
5x2−4x+55x^2 - 4x + 55x2−4x+5
9x2−4x−59x^2 - 4x - 59x2−4x−5