If 4+5=11, 6+4=14, 8+6=34 then 9+8 = ??

Question

IF
1,3,3=5
9,7,4=8
11,14,10=15
20,16,12=18
Than
3,6,7=?

Answer 1

As
(4*5)-(4+5)=11
(6*4)-(6+4)=14
(8*6)-(8+6)=34
Thn
(9*8)-(9+8)=55

Answer 2

9+8=55
since
9*8=72
9+8=17 (-)
-->> 72-17= 55