求出 a1∣a1∣+a2∣a2∣+a3∣a3∣...+a10∣a10∣+a1a2∣a1a2∣+a1a3∣a1a3∣+...+a9a10∣a9a10+a1a2a3∣a1a2a3∣+a1a2a3a4...a10∣a1a2...a10∣ \frac{a_1}{|a_1|}+\frac{a_2}{|a_2|} +\frac{a_3}{|a_3|}...+\frac{a_{10}}{|a_{10}|}+\frac{a_1a_2}{|a_1a_2}|+\frac{a_1a_3}{|a_1a_3|}+...+\frac{a_9a_{10}}{|a_9a_{10}}+\frac{a_1a_2a_3}{|a_1a_2a_3|}+\frac{a_1a_2a_3a_4...a_{10}}{|a_1a_2...a_{10}|}∣a1∣a1+∣a2∣a2+∣a3∣a3...+∣a10∣a10+∣a1a2a1a2∣+∣a1a3∣a1a3+...+∣a9a10a9a10+∣a1a2a3∣a1a2a3+∣a1a2...a10∣a1a2a3a4...a10
所有可能性值。
（话说初一上学期数学竞赛班就教因式分解正常吗）
