     
     func textViewDidChange(_ textView:UITextView)
     {
+        let text:String = textView.text
+        
         if text.characters.count == 2
         {
             let firstCharacter:Character = text[text.startIndex]

            selector:#selector(notifiedKeyboardChanged(sender:)),
            name:NSNotification.Name.UIKeyboardWillChangeFrame,
            object:nil)
    }
    
    required init?(coder:NSCoder)

{
    private weak var controller:CLinearEquationsPolynomial!
    private weak var viewControl:VLinearEquationsPolynomialControl!
    private weak var viewIndeterminate:VLinearEquationsPolynomialIndeterminate!
    private weak var viewShowAs:VLinearEquationsPolynomialShowAs!
    private weak var layoutControlBottom:NSLayoutConstraint!
    private weak var viewText:VLinearEquationsPolynomialText?
    private weak var viewDivision:VLinearEquationsPolynomialDivision?
    private let numberFormatter:NumberFormatter
    private let kNumberFormatterStyle:NumberFormatter.Style = NumberFormatter.Style.decimal
    private let kDot:String = "."
