KITYKAT KITYKAT 15-01-2016 Mathematics contestada Combine similar terms and apply the operation. Do NOT evaluate or simplify. 1) 2x + 4 + 3x 2) 12 + 5x -8 3) 2x^2 + 3x^2 + 4x 4) 5ax - 12 - ax 5) 4xy + 2x + 3xy + x