题目内容
计算：（
-
+
-
）-
+
=______．
| 4 |
| 3 |
| 15 |
| 36 |
| 9 |
| 20 |
| 7 |
| 12 |
| 11 |
| 30 |
| 13 |
| 42 |
（
-
+
-
）-
+
=
-（
+
）+（
+
）-（
+
）-（
+
）+（
+
），
=
-
-
+
+
-
-
-
-
+
+
，
=
-
-
+（
-
）+（
-
）+（
-
）-
+
，
=
-
+
，
=
．
故答案为：
．
| 4 |
| 3 |
| 15 |
| 36 |
| 9 |
| 20 |
| 7 |
| 12 |
| 11 |
| 30 |
| 13 |
| 42 |
=
| 4 |
| 3 |
| 1 |
| 12 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 6 |
=
| 4 |
| 3 |
| 1 |
| 12 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 6 |
=
| 4 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 7 |
=
| 2 |
| 3 |
| 1 |
| 12 |
| 1 |
| 7 |
=
| 61 |
| 84 |
故答案为：
| 61 |
| 84 |
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