| 2013×2014−1 |
| 2013+2012×2014 |
=
| 2013×2014−1 |
| 2013+(2013−1)×2014 |
=
| 2013×2014−1 |
| 2013+2013×2014−2014 |
=
| 2013×2014−1 |
| 2013×2014−(2014−2013) |
=
| 2013×2014−1 |
| 2013×2014−1 |
=1．
故答案为：1．
| 2013×2014−1 |
| 2013+2012×2014 |
| 2013×2014−1 |
| 2013+2012×2014 |
| 2013×2014−1 |
| 2013+(2013−1)×2014 |
| 2013×2014−1 |
| 2013+2013×2014−2014 |
| 2013×2014−1 |
| 2013×2014−(2014−2013) |
| 2013×2014−1 |
| 2013×2014−1 |