I have Mathematica installed on my computer and want to use Mathematica to simplify the scalar part an expression using the simplify algorithm, for which I tried using

kernel(scalar_backend="mathematica");

But, it shows "None" as output meaning. How can I thus connect Mathematica and Cadabra?

In particular I tried,

```
kernel(scalar_backend="mathematica");
ex:= (\sin{x}**2 + \cos{x}**2) A_{m};
simplify(_);
```

Which doesn't set `sinx^2+cosx^2=1`

.