www.wolframalpha.com

• 单个查询
  http://www.wolframalpha.com/input/?source=nav&i=simplify+radical+sqrt(567)
• notebook
  https://sandbox.open.wolframcloud.com/app/objects/7d8ef5ec-66df-4979-a362-027d7746e539#sidebar=compute
• 资料 https://www.wolfram.com/language/elementary-introduction/2nd-ed/22-machine-learning.html
• 用个人账号登陆后 https://develop.wolframcloud.com/app/