If 5+3=10, 7+4=35 and 10+2=45 then 8+6=?

Question

If
2 3 = 10
7 2 = 63
6 5 = 66
8 4 = 96
then
9 7 = ?

Answer 1

a+b = a!/(b!(a-b)!)
8+6
=8!/(6!(8−6)!)
=8!/(6!*2!)
= 28

Answer 2

70 is my answer