ricky2007 ricky2007 24-01-2020 Mathematics contestada PracticeSimplify each expression by combining like terms.1. 6x + 4x2. – 5y + 2y3.-3m - 8(m + 1)4.-8(r - 2) + 6(r - 2)5.9m - 7m + 13Plz someone help me