What is the sum of −3x+6−3x+6 and 7x−87x−8 ?
−11x+13
−10x−14
−4x+2
−4x2+2
2x2x
4x−24x−2
4x2−24x2−2
−11x+13
−10x−14
−4x+2
−4x2+2
2x2x
4x−24x−2
4x2−24x2−2