tolong bantuin kak aku mohonn

6. =729×729=9^3×9^3=9^6
7. = 63+18=81
8. =15625×64=1000.000=10^6
9. b^-3:b^6=b^(-3-6)=b^-9
10. x^4y^-5
11. 8
12. 1/16
13. 8
14. 3.125
15. u^3y^2