Answer:
64a^6b^9c^15
hope that helps
16. 200+3
17. 30+4+0.1+0.02+0.007
18. 200+70+6+0.1+0.03
19. 30000000+4000000+100000+20000+3000+6
Step-by-step explanation:
I attached the image that has all of the elements. If I missed something, please let me know and I will fix it.