???????????????????????????????????
To find the sum:

Therefore the answer is a^3+12a^2+14a+5.
Hope it helps!
The next two numbers are 0.24 0.36 Your just adding 0.06.
Hope this helped you!
Answer: 1,431
<u>Step-by-step explanation:</u>
split the thing into two rectangular prisms
small prism dimensions: 18 x 2 x 3
multiply the dimensions to get 108
large prism dimensions: 7 x 21 x 9
multiply the dimensions to get 1,323
add 1,323 and 108 together to get 1,431