If, 9 * 8 * 7 = 65 ; 8 * 7 * 6 = 50 ; 7 * 6 * 5 = 37 Find 6 * 5 * 4 = ?

Question

If
6 + 4 = 210
9 + 2 = 711
8 + 5 = 313
5 + 2 = 37
7 + 6 = 113
9 + 8 = 117
10 + 6 = 416
15 + 3 = 1218
Then
?? + ?? = 123

Answer 1

1) 9*8 -7 = 65
2) 8*7 -6= 50
3) 7*6 -5= 37
4) 6*5 -4= 26

so answer is 26.

Answer 2

Answer is 26.
6 + 5 * 4 = 26 like others 9 + 8 * 7 = 65 ; 8 + 7 * 6 = 50 ; 7 + 6 * 5 = 37.