2+3=5 3+7=27 4+5=32 5+8=60 6+7=72 7+8=????

a+b= c & n=c*a -a=(c-1)*a

2+3=5 & 5*2-2=4*2=8

3+7=10 & 10*3-3=9*3=27

4+5=9 & 4*9-4=8*4=32

5+8=13 & 5*13-5=12*5=60

6+7=13 & 6*13-6=12*6=72

7+8=15 & 7*15-7=14*7=98

Rap

I came up with 79.

if 2 + 3 = 5, 2=2, 3=3

if 3 + 7 = 27, 3=3, 7=24
if 4 + 5 = 32, 5=5, 4=27
if 5 + 8 =60, 5=5, 8=55
if 6 + 7 = 72, 7=24, 6=48

7 + 8 = ?, 24 + 55 = 79

I'm bumping this to find out what the answer is.