This doesn't quite seem to work:
```
In [18]: hankel2(z, t).conjugate()
Out[18]: 
_____________
hankel₂(z, t)

```

compare:
```
In [23]: sin(z).conjugate()
Out[23]: 
   ⎛_⎞
sin⎝z⎠

```

or is that what you intend?