 		expandAndSimplify: ->
 			@copy()
 
-		toString: ->
-			"Ïƒ(#{@label})"
-
 		toMathML: ->
 			dummyVar = new Variable("Ïƒ(#{label})")
 			return dummyVar.toMathML(arguments)


		copy: ->
			return new Terminal(@label)

		toString: ->
			@label

	class Constant extends Terminal
		# Constants in the equation tree, e.g. 1/2

				return html + "#{@numerator}" + closingHTML
			return html + "(#{@numerator}/#{@denominator})" + closingHTML

		toDrawingNode: ->
			NumberNode = require("prettyRender").Number
			FractionNode = require("prettyRender").Fraction
