3 c+22c+15c

To simplify the expression 3c + 22c + 15c, we can combine the like terms (terms with the same variable, in this case, c).

3c + 22c + 15c = (3 + 22 + 15)c

Now, we can calculate the sum of the coefficients:

(3 + 22 + 15) = 40

Therefore, the simplified expression is:

40c