       class: 'math-button other exponent'
     }, opts)
 
-  root: (opts)->
-    degree = if opts.degree
-      "<div class='degree'>#{opts.degree}</div>"
-    else
-      ""
-    radicand = if opts.radicand
-      "<div class='radicand'>#{opts.radicand}</div>"
-    else
-      "<div class='radicand'>#{math_var('x')}</div>"
-
+  del: (opts)->
     @button({
-      value: 'root'
-      label: """
-        #{degree}
-        #{radicand}
-        <div class='radix'>&radic;</div>
-        <div class='vinculum'>&#8212;</div>
-      """
-      class: 'math-button other root'
+      value: 'del'
+      class: 'math-button other del'
     }, opts)
-
 
   fraction: (opts)->
     @button({

  initialize: (@opts={})->
    @ui_elements = @opts.ui_elements

  base10Digits: (opts={})->
    for num in [0..9]
      do (num)=>

          class: 'math-button number-specifier number'
        }, opts)

  negative: (opts)->
    @button({
      value: 'negative'
      label: '&#x2013;'
      class: 'math-button number-specifier negative'
    }, opts)

  decimal: (opts)->
