Answer:
36 + 9 u^3 + -54 v^2
Explanation:
Expand the following: 
-9 (-u^3 - 4 + 6 v^2) 
 
-9 (-4 - u^3 + 6 v^2) = -9 (-4) - 9 (-u^3) - 9×6 v^2: 
-9 (-4) - -9 u^3 - 9×6 v^2 
 
-9 (-4) = 36: 
36 - -9 u^3 - 9×6 v^2 
 
-9 (-1) = 9: 
36 + 9 u^3 - 9×6 v^2 
 
-9×6 = -54: 
Answer: 36 + 9 u^3 + -54 v^2