smichr/sympy — comment on commit 5c889b4098b0431b7aabc6d4bd31683ae3979117
File: sympy/simplify/simplify.py line 1037
By pernici:

What do you think about adding

```
elif d.is_Add:
d = radsimp(d)
```

to simplify the following?

```
>>> from sympy import *
>>> z = 1/(1/(1+sqrt(2)) + 1/(1+sqrt(3)))
>>> radsimp(z)
(-3 + 4*sqrt(2) + 7*sqrt(3) + 6*sqrt(6))/23
```