I try to set a button to speech the text in a label (with different voices / languages), but the speech is not working very well when there are operator symbols (+, -, ×), any idea to fix this problem?

I tried:

```
//Option 1
TextLabel.text = "1 + 2 - 3 × 4" // Result: "+" = "and" other voice "plus" (ok), "-" = mute, "×" = mute, other voice "X" (letter)

//Option 2
TextLabel.text = "1 ➕ 2 ➖ 3 ✖️ 4" // Result: "+" = plus symbol, "-" = minus symbol, "×" = multiplication symbol

```

```
import UIKit
import AVFoundation
import Speech

class ViewController: UIViewController {
    let synth = AVSpeechSynthesizer()

    @IBAction func speaker(_ sender: UIButton) {
        if (!synth.isSpeaking) {
            let speech = AVSpeechUtterance(string: TextLabel.text!)

            speech.voice = AVSpeechSynthesisVoice(language: "en-US")
            speech.rate = 0.5
            speech.pitchMultiplier = 1
            speech.volume = 1
            synth.speak(speech)
        }
    }

    @IBOutlet weak var TextLabel: UILabel!

    //Option 1
    TextLabel.text = "1 + 2 - 3 × 4" // "+" = "and" other voice "plus" (ok), "-" = mute, "×" = mute, other voice "X" (letter)

    //Option 2
    TextLabel.text = "1 ➕ 2 ➖ 3 ✖️ 4" // "+" = plus symbol, "-" = minus symbol, "×" = multiplication symbol
}

```

I expect speech the symbol + (plus), - (minus), ×(times) correctly in different languages with AVSpeechSynthesisVoice, but the Option 1 is not correct or mute some symbol... and the Option 2 is better but reproduce the word "symbol"