1) a^5a^8 = a^(5+8) = a^132) a^8/a^5 = a^(8-5) = a^33) (a^5)^8 = a^(58) = a^404) (a^3)^2a^15/a^17 = a^(32+15-17) = a^4*a^15/a^17 = a^19/a^17 = a^(19-17) = a^2
1) -2a^7b(-3)a^4b^9 = 6a^11b^102) (-3a^3b^2)^4 = 81a^12b^8
1) a^5a^8 = a^(5+8) = a^13
2) a^8/a^5 = a^(8-5) = a^3
3) (a^5)^8 = a^(58) = a^40
4) (a^3)^2a^15/a^17 = a^(32+15-17) = a^4*a^15/a^17 = a^19/a^17 = a^(19-17) = a^2
1) -2a^7b(-3)a^4b^9 = 6a^11b^10
2) (-3a^3b^2)^4 = 81a^12b^8