If 23 + 1 = 4; 46 + 5 = 5; 87 + 3 = 12; 72 + 3 = 6 then 86 + 7 = ?

Question

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

Answer 1

answer =7
add first two digits and from the result deduct the third number ie14-7=7

Answer 2

2+3=5 -1 =4,....so on
8+6=14-7=7.