Yes.

```
In [5]: x = Symbol("x", real=True) 

In [6]: exp(log(2) + O(x)).nseries(x, 0, 2)
Out[6]: 2 + O(x)

In [7]: ((2 + O(x))**(1 + x)).nseries(x, 0, 2)
Out[7]: 2 + O(x)
```