1. 6a+8a = a*(6+8)=14a
2. 28c-15c = c*(28-15) = 13c
3. 13y-2y = y*(13-2) = 11y
4. m+29m = m*(1+29) = 30m
5. 98p-p = p*(98-1) = 97p
6. 17k+k = k*(17+1) = 18k
7. 4x+13x+15x = x*(4+13+15) = 32x
8. 67z-18z+37 = z*(67-18)+37 = 49z+37
9. 35x+x-6 = x*(35+1) - 6 = 36x-6 можно записать и 6*(6х-1)