Please answer all of the 3.
PLEASE! And I’ll give you 5 stars and a Thanks?! :)

Answer:
7) 2((7x12) + (7x2) + (12x2)
2(84 + 14 + 24)
2(122)
244
8) 2((13x4) + (4x6) + (13x6))
2(52 + 24 + 78)
2(154)
308
9) 2((4x15) + (4x8) + (15x8))
2(60 + 32 + 120)
2(212)
424
Step-by-step explanation: