If 5+3 = 28, 9+1=810, 8+6=214 then 7+3 = ?

Question

If
1,4,3=13;
4,5,4=9;
5,6,5=11 and
7,7,6=7
then
9,8,7=?

Answer 1

answer is 410.
Approach is -
5+3 = 28 -> (5-3)(5+3)
9+1=810 -> (9-1)(9+1)
8+6=214 -> (8-6)(8+6)
7+3 = ? -> (7-3)(7+3) = 410

Answer 2

Ans is 410

(7-3) & (7+3)