What is the pattern?
6+4= 210
9+2= 711
8+5- 313
5+2= 37
7+6= 113
9+8= 117
10+6= 416
15+3= 1218

The pattern is that the result of subtracting the two numbers is the first integer in the answer, followed by the result of adding the numbers. For example, 6 + 4 = 210. 6 - 4 = 2 and 6 + 4 = 10.