题干
先化简再求值：
+1
，其中a = 2 + 3
| a |
| 2 |
| - |
| 5 |
| a |
| + |
| 2 |
| a |
| + |
| 2 |
| a |
| 2 |
| - |
| 4 |
| a |
| 2 |
| + |
| 4 |
| a |
| + |
| 4 |
答案(点此获取答案解析）
【解答】解：原式=
| a |
| 2 |
| - |
| 5 |
| a |
| + |
| 2 |
| a |
| + |
| 2 |
| a |
| 2 |
| - |
| 4 |
| a |
| 2 |
| + |
| 4 |
| a |
| + |
| 4 |
【解答】解：原式=
，则
的值是_________
