Question

1,2= 23
2, 3=65
3,4=127
5, 6=?

Answer 1

1,2 => 1×2 = 2 and 1+2 = 3 => 23

2,3 => 2×3 = 6 and 2 + 3 = 5 => 65

Similarly,

5,6 => 5×6 = 30 and 5 + 6 = 11=> 3011

$\mathfrak{5,6=3011}$

Answer 2

209 is the answer for your question