1) a^5 a^8 = a^132) a^8 : a^5 = a^33) (a^5)^8 = a^404) (a^3)^2 a^15 / a^17 = a^6 * a^15 / a^17 = a^21 / a^17 = a^4
1) a^5 a^8 = a^13
2) a^8 : a^5 = a^3
3) (a^5)^8 = a^40
4) (a^3)^2 a^15 / a^17 = a^6 * a^15 / a^17 = a^21 / a^17 = a^4