I think its x^2(18x^2 -9+4x) sorry if I’m wrong
1099 square inches hope this helps
Let's work on Sections. The top rectangle has an area of 54 (6x9) the base rectangle has an area of 360 ((9+6+9+5)×12) and the bottom rectangle has an area of 54 (9×6) now we add and we get 468. thus the answer is C.