Для решения используем свойства степеней:
1) (c^3)^4 = c^(3*4) = c^12
2) (-c^7)^2 = c^(7*2) = c^14
3) c^5c^2 = c^(5+2) = c^7
4) (c^5)^4 = c^(5*4) = c^20
5) ((c^2)^3)^6 = c^(2*3*6) = c^36
6) (c^8)^6 : c^45 = c^(8*6) : c^45 = c^48 : c^45 = c^(48-45) = c^3
7) (c^8)^3 * (c^3)^8 = c^(8*3) * c^(3*8) = c^24 * c^24 = c^(24+24) = c^48
8) (-c^3)^5 * (-c^5)^7 : c^25 = -c^(3*5) * -c^(5*7) : c^25 = c^15 * c^35 : c^25 = c^(15+35-25) = c^25
9) c^34 : (c^8)^2 * c^15 = c^34 : c^(8*2) * c^15 = c^34 : c^16 * c^15 = c^(34-16+15) = c^33
Ответ: 1) c^12, 2) c^14, 3) c^7, 4) c^20, 5) c^36, 6) c^3, 7) c^48, 8) c^25, 9) c^33