simplify
1. (5)³. (5)²
2. 27-⁴
3. (15a⁵b³c²)⁰
4. (²/b)³
5.(25/4))²
6. 27¹/³
7. 5 ¹/³. 5³/⁵
8. (7³)²/³
9. (12bc³)³/⁴
10. (3x²yz³)-¹/²
11. √25a²
12. √27m³a³e³
13. √200y⁷
14. ³√8ram⁴
15. ³√125 c⁶h³e⁴​