{"action":"closed","issue":{"url":"https://api.github.com/repos/Khan/khan-exercises/issues/147007","labels_url":"https://api.github.com/repos/Khan/khan-exercises/issues/147007/labels{/name}","comments_url":"https://api.github.com/repos/Khan/khan-exercises/issues/147007/comments","events_url":"https://api.github.com/repos/Khan/khan-exercises/issues/147007/events","html_url":"https://github.com/Khan/khan-exercises/issues/147007","id":24580168,"number":147007,"title":"Adding and subtracting polynomials - Correct answer not marked correct","user":{"login":"KhanBugz","id":924247,"avatar_url":"https://avatars.githubusercontent.com/u/924247?v=3","gravatar_id":"","url":"https://api.github.com/users/KhanBugz","html_url":"https://github.com/KhanBugz","followers_url":"https://api.github.com/users/KhanBugz/followers","following_url":"https://api.github.com/users/KhanBugz/following{/other_user}","gists_url":"https://api.github.com/users/KhanBugz/gists{/gist_id}","starred_url":"https://api.github.com/users/KhanBugz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/KhanBugz/subscriptions","organizations_url":"https://api.github.com/users/KhanBugz/orgs","repos_url":"https://api.github.com/users/KhanBugz/repos","events_url":"https://api.github.com/users/KhanBugz/events{/privacy}","received_events_url":"https://api.github.com/users/KhanBugz/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/Khan/khan-exercises/labels/chrome","name":"chrome","color":"e102d8"},{"url":"https://api.github.com/repos/Khan/khan-exercises/labels/other","name":"other","color":"e10c02"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2013-12-19T19:31:39Z","updated_at":"2015-11-18T01:48:57Z","closed_at":"2015-11-18T01:48:57Z","body":"Double-checked many times.  My answer matches the one at the bottom of hints but says it's wrong.\n\n[adding_and_subtracting_polynomials.html?seed=30&problem=0](http://sandcastle.kasandbox.org/media/castles/Khan:master/exercises/adding_and_subtracting_polynomials.html?seed=30&problem=0&debug&lang=en)\n\n[Answer timeline](http://sandcastle.kasandbox.org/media/castles/Khan:master/exercises/adding_and_subtracting_polynomials.html?seed=30&problem=0&debug&lang=en&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22-4t%5E6%2B2r%5E5%2B7r%5E3%5C%22%22%2C47%5D%5D)\n\n    [\"-4t^6+2r^5+7r^3\"]\n\nLocale: en\n\nUser hash: 801801714\n\nMozilla/5.0 (X11; CrOS armv7l 4731.81.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.62 Safari/537.36\n\nMathJax is loaded, ready, queue length: 0\n\n\n\nstart of log\nloadModule mod /khan-exercises/utils/answer-types.js\nloadModule mod /khan-exercises/utils/tmpl.js\nloadModule mod /khan-exercises/utils/tex.js\nloadModule mod /khan-exercises/utils/jquery.adhesion.js\nloadModule mod /khan-exercises/utils/calculator.js\nloadModule mod /khan-exercises/third_party/MathJax/2.1/MathJax.js?config=KAthJax-9e2776ffe7d2006f16f36d0d55d9464b\nloadScript loading /khan-exercises/third_party/MathJax/2.1/MathJax.js?config=KAthJax-9e2776ffe7d2006f16f36d0d55d9464b\nloadScript loaded /khan-exercises/third_party/MathJax/2.1/MathJax.js?config=KAthJax-9e2776ffe7d2006f16f36d0d55d9464b\nstartTask...\nstartTask got task adding_and_subtracting_polynomials\nrenderExerciseTask adding_and_subtracting_polynomials\nloading and rendering adding_and_subtracting_polynomials\nloadExercise start adding_and_subtracting_polynomials.html\nloadExercise got adding_and_subtracting_polynomials.html\nloadExercise submod math\nloadModule mod /khan-exercises/utils/math.js\nloadModule mod /khan-exercises/utils/../third_party/raphael.js\nloadModule mod /khan-exercises/utils/knumber.js\nloadExercise submod math-format\nloadModule mod /khan-exercises/utils/math-format.js\nloadModule mod /khan-exercises/utils/expressions.js\nloadExercise submod polynomials\nloadModule mod /khan-exercises/utils/polynomials.js\nloadExercise submod functional\nloadModule mod /khan-exercises/utils/functional.js\nloadExercise submod answer-types\nloadExercise submod tmpl\nloadExercise submod tex\nloadExercise submod jquery.adhesion\nloadExercise submod calculator\nloadExercise submod /khan-exercises/third_party/MathJax/2.1/MathJax.js?config=KAthJax-9e2776ffe7d2006f16f36d0d55d9464b\nloadExercise finish adding_and_subtracting_polynomials.html\nloaded adding_and_subtracting_polynomials, now rendering\nstart of makeProblem\nchose problem type and seed for adding_and_subtracting_polynomials\ncloned problem\ncloned global elements\nran tmplApply to vars and main elements\nran tmplApply to [id]\nremoved hints from DOM\nevaled inline scripts\nadded inline styles\n(answer-typesLoad not a fn; src undefined)\nrunning tmplLoad\nran tmplLoad\n(texLoad not a fn; src undefined)\n(jquery.adhesionLoad not a fn; src undefined)\n(calculatorLoad not a fn; src undefined)\nrunning mathLoad\nran mathLoad\n(../third_party/raphaelLoad not a fn; src undefined)\n(knumberLoad not a fn; src undefined)\n(math-formatLoad not a fn; src undefined)\n(expressionsLoad not a fn; src undefined)\n(polynomialsLoad not a fn; src undefined)\n(functionalLoad not a fn; src undefined)\ndone with runModules Load\n(answer-types not a fn; src undefined)\nrunning tmpl\nran tmpl\nrunning tex\nran tex\n(jquery.adhesion not a fn; src undefined)\n(calculator not a fn; src undefined)\n(math not a fn; src undefined)\n(../third_party/raphael not a fn; src undefined)\n(knumber not a fn; src undefined)\n(math-format not a fn; src undefined)\n(expressions not a fn; src undefined)\n(polynomials not a fn; src undefined)\n(functional not a fn; src undefined)\ndone with runModules\ndecided on answer type expression\nvalidator created\n(answer-types not a fn; src undefined)\nrunning tmpl\nran tmpl\nrunning tex\nran tex\n(jquery.adhesion not a fn; src undefined)\n(calculator not a fn; src undefined)\n(math not a fn; src undefined)\n(../third_party/raphael not a fn; src undefined)\n(knumber not a fn; src undefined)\n(math-format not a fn; src undefined)\n(expressions not a fn; src undefined)\n(polynomials not a fn; src undefined)\n(functional not a fn; src undefined)\n(answer-types not a fn; src undefined)\nrunning tmpl\nran tmpl\nrunning tex\nran tex\n(jquery.adhesion not a fn; src undefined)\n(calculator not a fn; src undefined)\n(math not a fn; src undefined)\n(../third_party/raphael not a fn; src undefined)\n(knumber not a fn; src undefined)\n(math-format not a fn; src undefined)\n(expressions not a fn; src undefined)\n(polynomials not a fn; src undefined)\n(functional not a fn; src undefined)\n(answer-types not a fn; src undefined)\nrunning tmpl\nran tmpl\nrunning tex\nMathJax done typesetting (\n                    \n                        \n                            \n                                -\n                                \\color{#6495ED}{4\n                                r^6}\n                            \n                        \n                            \n                                +\n                                \\color{#DF0030}{5\n                                r^5}\n                            \n                        \n                            \n                                +\n                                \\color{#28AE7B}{2\n                                r^3}\n                            \n                        \n                    \n                        \n                            \n                        \n                            \n                                -\n                                \\color{#DF0030}{3\n                                r^5}\n                            \n                        \n                            \n                                +\n                                \\color{#28AE7B}{5\n                                r^3}\n                            \n                        \n                    \n                )\nran tex\n(jquery.adhesion not a fn; src undefined)\n(calculator not a fn; src undefined)\n(math not a fn; src undefined)\n(../third_party/raphael not a fn; src undefined)\n(knumber not a fn; src undefined)\n(math-format not a fn; src undefined)\n(expressions not a fn; src undefined)\n(polynomials not a fn; src undefined)\n(functional not a fn; src undefined)\n(answer-types not a fn; src undefined)\nrunning tmpl\nran tmpl\nrunning tex\nMathJax done typesetting (\n                    \n                        \n                            \\color{#6495ED}{\n                            \n                                -4\n                            \n                            \n                            r^6}\n                        \n                    \n                        \n                             + \\color{#DF0030}{\n                            \n                            (\n                                \n                                    5\n                                \n                                    \n                                        \n                                    -3\n                                )\n                            \n                            r^5}\n                        \n                    \n                        \n                             + \\color{#28AE7B}{\n                            \n                            (\n                                \n                                    2\n                                \n                                    \n                                        +\n                                    5\n                                )\n                            \n                            r^3}\n                        \n                    \n                )\nran tex\n(jquery.adhesion not a fn; src undefined)\n(calculator not a fn; src undefined)\n(math not a fn; src undefined)\n(../third_party/raphael not a fn; src undefined)\n(knumber not a fn; src undefined)\n(math-format not a fn; src undefined)\n(expressions not a fn; src undefined)\n(polynomials not a fn; src undefined)\n(functional not a fn; src undefined)\n(answer-types not a fn; src undefined)\nrunning tmpl\nran tmpl\nrunning tex\nran tex\n(jquery.adhesion not a fn; src undefined)\n(calculator not a fn; src undefined)\n(math not a fn; src undefined)\n(../third_party/raphael not a fn; src undefined)\n(knumber not a fn; src undefined)\n(math-format not a fn; src undefined)\n(expressions not a fn; src undefined)\n(polynomials not a fn; src undefined)\n(functional not a fn; src undefined)\nMathJax done typesetting (\\displaystyle -4)\nMathJax done typesetting (\\displaystyle -4t)\nMathJax done typesetting (\\displaystyle -4t^{6})\nMathJax done typesetting (\\displaystyle -4t^{6}+2)\nMathJax done typesetting (\\displaystyle -4t^{6}+2r)\nMathJax done typesetting (\\displaystyle -4t^{6}+2r^{5})\nMathJax done typesetting (\\displaystyle -4t^{6}+2r^{5}+7)\nMathJax done typesetting (\\displaystyle -4t^{6}+2r^{5}+7r)\nMathJax done typesetting (\\displaystyle -4t^{6}+2r^{5}+7r^{3})"}}