text: 
  // [operand] [operator] [operand]
  
  class Expressable {
  	constructor(left, operator, right){
  		this.left = left;
  		this.right = right;
  		this.operator = operator;
  	}
  
  	async express(ctx){
  		return this.operator.express(this.left, this.right, ctx);
  	}
  }
  
  module.exports = {
  	Expressable
  };
  