IQ<120 别进~~~

They say only people with an IQ of 120 and over are able to figure this out.
If:
2 + 3 = 10
7 + 2 = 63
6 + 5 = 66
8 + 4 = 96
Then:
9 + 7 =???? 超过１０秒钟想出来的算输。