code: function tex2svg( str, options, clbk ) {
  	if ( arguments.length === 2 ) {
  		// Assume that `options` is a callback argument...
  		return factory( {}, options )( str );
  	}
  	factory( options, clbk )( str );
  }
docs: TEX2SVG // 
  FUNCTION: tex2svg( str[, options], clbk )
  Converts a TeX or LaTeX string to an SVG.
  
  @param {String} str - string to convert
  @param {Object} [options] - function options
  @param {Number} [options.width=100] - container width in `ex`
  @param {Number} [options.ex=6] - `ex` size in pixels
  @param {Boolean} [options.inline=false] - specifies whether to format the input string as an inline equation
  @param {Boolean} [options.linebreaks=true] - enable linebreaking
  @param {Function} clbk - callback to invoke once finished
  @returns {Void}