Now what would be really great is if Makie or Plots had a `@curve`

macro *and* some logic that determines a good scale for the axes like Wolfram Alpha does. Then I could just type this:

```
@curve(x^3 - 6x^2 + 4x + 12)
```

EDIT:

I think I could even get away with typing it like this:

```
@curve x^3 - 6x^2 + 4x + 12
```

EDIT #2:

Though the parsing might be too fragile without the parentheses. Note the difference between these two expressions:

```
julia> Meta.show_sexpr(:(@curve x^3 - 6x^2 + 4x + 12))
(:macrocall, Symbol("@curve"), :(#= REPL[30]:1 =#), (:call, :+, (:call, :-, (:call, :^, :x, 3), (:call, :*, 6, (:call, :^, :x, 2))), (:call, :*, 4, :x), 12))
julia> Meta.show_sexpr(:(@curve x^3 -6x^2 + 4x + 12))
(:macrocall, Symbol("@curve"), :(#= REPL[31]:1 =#), (:call, :^, :x, 3), (:call, :+, (:call, :*, -6, (:call, :^, :x, 2)), (:call, :*, 4, :x), 12))
```