{"action":"created","issue":{"url":"https://api.github.com/repos/serlo-org/athene2/issues/358","repository_url":"https://api.github.com/repos/serlo-org/athene2","labels_url":"https://api.github.com/repos/serlo-org/athene2/issues/358/labels{/name}","comments_url":"https://api.github.com/repos/serlo-org/athene2/issues/358/comments","events_url":"https://api.github.com/repos/serlo-org/athene2/issues/358/events","html_url":"https://github.com/serlo-org/athene2/issues/358","id":160893801,"number":358,"title":"Input challenges: allow multiple input challenges","user":{"login":"inyono","id":1508477,"avatar_url":"https://avatars.githubusercontent.com/u/1508477?v=3","gravatar_id":"","url":"https://api.github.com/users/inyono","html_url":"https://github.com/inyono","followers_url":"https://api.github.com/users/inyono/followers","following_url":"https://api.github.com/users/inyono/following{/other_user}","gists_url":"https://api.github.com/users/inyono/gists{/gist_id}","starred_url":"https://api.github.com/users/inyono/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/inyono/subscriptions","organizations_url":"https://api.github.com/users/inyono/orgs","repos_url":"https://api.github.com/users/inyono/repos","events_url":"https://api.github.com/users/inyono/events{/privacy}","received_events_url":"https://api.github.com/users/inyono/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/serlo-org/athene2/labels/question","name":"question","color":"cc317c"}],"state":"open","locked":false,"assignee":{"login":"inyono","id":1508477,"avatar_url":"https://avatars.githubusercontent.com/u/1508477?v=3","gravatar_id":"","url":"https://api.github.com/users/inyono","html_url":"https://github.com/inyono","followers_url":"https://api.github.com/users/inyono/followers","following_url":"https://api.github.com/users/inyono/following{/other_user}","gists_url":"https://api.github.com/users/inyono/gists{/gist_id}","starred_url":"https://api.github.com/users/inyono/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/inyono/subscriptions","organizations_url":"https://api.github.com/users/inyono/orgs","repos_url":"https://api.github.com/users/inyono/repos","events_url":"https://api.github.com/users/inyono/events{/privacy}","received_events_url":"https://api.github.com/users/inyono/received_events","type":"User","site_admin":false},"milestone":null,"comments":7,"created_at":"2016-06-17T13:56:02Z","updated_at":"2016-06-19T10:43:16Z","closed_at":null,"body":""},"comment":{"url":"https://api.github.com/repos/serlo-org/athene2/issues/comments/226990531","html_url":"https://github.com/serlo-org/athene2/issues/358#issuecomment-226990531","issue_url":"https://api.github.com/repos/serlo-org/athene2/issues/358","id":226990531,"user":{"login":"inyono","id":1508477,"avatar_url":"https://avatars.githubusercontent.com/u/1508477?v=3","gravatar_id":"","url":"https://api.github.com/users/inyono","html_url":"https://github.com/inyono","followers_url":"https://api.github.com/users/inyono/followers","following_url":"https://api.github.com/users/inyono/following{/other_user}","gists_url":"https://api.github.com/users/inyono/gists{/gist_id}","starred_url":"https://api.github.com/users/inyono/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/inyono/subscriptions","organizations_url":"https://api.github.com/users/inyono/orgs","repos_url":"https://api.github.com/users/inyono/repos","events_url":"https://api.github.com/users/inyono/events{/privacy}","received_events_url":"https://api.github.com/users/inyono/received_events","type":"User","site_admin":false},"created_at":"2016-06-19T10:43:16Z","updated_at":"2016-06-19T10:43:16Z","body":"I quickly look into http://khan.github.io/perseus/. It is basically a combination of configurable and multiple answers:\r\n<img width=\"359\" alt=\"screen shot 2016-06-19 at 12 29 54\" src=\"https://cloud.githubusercontent.com/assets/1508477/16176836/5e8e0a6c-361a-11e6-8f68-21c5cb83cc04.png\">\r\n<img width=\"361\" alt=\"screen shot 2016-06-19 at 12 30 58\" src=\"https://cloud.githubusercontent.com/assets/1508477/16176837/5f887434-361a-11e6-9354-601fc631cd14.png\">\r\n\r\nSee e.g. https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equivalent-exp/cc-6th-distributive-property/e/distributive-property-with-variables\r\n\r\nThe problem with CASs is that we don't want the full power. So we would require a CAS that only applies some configurable simplifications. And I don't know a CAS that does this (this would be a pretty cool project, btw)."}}
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