Reducir un polynomio 4a-5b+7c+8a-19c-b+5b-c

Given polynomial is : 4a - 5b + 7c + 8a - 19c - b + 5b - c Putting like terms together, = (4a + 8a) + (-5b - b + 5b) + (7c - 19c -c) = 12a - b - 13c