[gbear605]

What if you wanted ‘if x>2 || x < -2’?

[thaumasiotes]

That's not exactly a challenge for the syntax...

    if-not x[-2,2]

Just like you'd write x ∉ [-2,2] with pen and paper.

[function_seven]

Not parent, but I would write

    x)-2,2(

or

    x![-2,2]