One gets a wrong output when running the following command:

```
sage: sum(binomial(1,n),n,0,oo)
3
```

The output should be $2$ instead of $3$. Compare:

```
sage: sum(binomial(1,n),n,0,oo,algorithm="sympy")
2
```

1 | initial version |

One gets a wrong output when running the following command:

```
sage: sum(binomial(1,n),n,0,oo)
3
```

The output should be $2$ instead of $3$. Compare:

```
sage: sum(binomial(1,n),n,0,oo,algorithm="sympy")
2
```

2 | retagged |

One gets a wrong output when running the following command:

```
sage: sum(binomial(1,n),n,0,oo)
3
```

The output should be $2$ instead of $3$. Compare:

```
sage: sum(binomial(1,n),n,0,oo,algorithm="sympy")
2
```

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