Jellyacesantosgo Jellyacesantosgo Math Answered 7. Simplify the algebraic expression: (6x? - 4x - 1) + (7x} + 5x2 - 4x + 7)a. 13x -3x + 6c. 13x3 + 5x2 - 8x + 6b. 13x3 + 5x² + 6d. 13x3 + 5x2 + 8x + 6