Verified Answer :

Trans

First: 27, I think, I am not sure
Second: 213+55=51
Third: 6^3-4^2=201

9 is to 12 as 27 is to 30 because 9/12=.75 and 27/30 is also = .75
2 × 13 + 5 × 5 = 51
   26     +   25  = 51
6³ - 4² + 1 = 201
216 - 16 = 200
200 + 1 = 201