Posted by haifeng on 2015-08-31 16:48:36 last update 2015-08-31 16:48:36 | Answers (1) | 收藏
如果
\[ \begin{aligned} 6+4&=210,\\ 9+2&=711,\\ 8+5&=313,\\ 5+2&=37,\\ \end{aligned} \]
请问 $7+6=?$
