Simplifying expressions is easy as all we must do is combine like-terms.
8c-4-2c+5 Here, we can see that the "c's" are like terms and the regular numbers are like terms.
6c-4+5 We combined the -2 and 8 to get 6, and then added our "c" back.
6c+1 Here, we simply added the -4 and 5, or simply put 5-4, which equals 1.
Using the math above, we can see that the simplest form of this equation is 6c+1.