计算，能简算的要简算．12+15-18512(14+712)157-13+67710-(13+14)67-16-3101312-14+1124-34．-数学
| 7 |
| 12 |
| 1 |
| 4 |
=1+
| 1 |
| 4 |
=1
| 1 |
| 4 |
（3）
| 15 |
| 7 |
| 1 |
| 3 |
| 6 |
| 7 |
=
| 15 |
| 7 |
| 6 |
| 7 |
| 1 |
| 3 |
=3-
| 1 |
| 3 |
=2
| 2 |
| 3 |
（4）
| 7 |
| 10 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 7 |
| 10 |
| 7 |
| 12 |
=
| 7 |
| 60 |
（5）
| 6 |
| 7 |
| 1 |
| 6 |
| 3 |
| 10 |
=
| 29 |
| 42 |
| 3 |
| 10 |
=
| 41 |
| 105 |
（6）
| 13 |
| 12 |
| 1 |
| 4 |
| 11 |
| 24 |
| 3 |
| 4 |
=（
| 13 |
| 12 |
| 11 |
| 24 |
