What exactly are you trying to solve?

Are you trying to find the greatest common factor (GCF) for one expression '32a+56b-16c' only?

If you are trying to find GCF for '32a', '56b' and '-16c' you should type them in separated by comma.

This way you will find that GCF (32a,56b,-16c) = 2^3

Click here to see the step by step solution.