new_contents: from sympy.abc import *
  
  from flask import Flask, request
  app = Flask(__name__)
  
  @app.route('/code', methods=['GET', 'POST'])
  def code():
      return str(eval(request.json['code']))
  
  if __name__ == "__main__":
      app.run(debug=True, port=80)
  
subject: Add flask server for evaluating expressions