# Numerical Input Problem Limitations

**URL:** <https://discuss.openedx.org/t/numerical-input-problem-limitations/9975>\
**Category:** Authoring\
**Created:** [April 27, 2023, 8:36am UTC](https://discuss.openedx.org/t/numerical-input-problem-limitations/9975 "2023-04-27T08:36:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Roline](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.openedx.org/roline/32/2746_2.png) [@Roline](https://discuss.openedx.org/u/Roline)\
**Post date:** [April 27, 2023, 8:36am UTC](https://discuss.openedx.org/t/numerical-input-problem-limitations/9975/1 "2023-04-27T08:36:26Z")

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The numerical input box does not allow for the use of characters I need students to enter in an answer like this equation: x^2+y^3=12

Currently it does not allow for signs like =, a comma and mixed fractions. Also curly brackets for set notation {2,3} and the emptyset MathJax character.

Is there a way the problem type’s acceptable answers can be extended course wide? I do not want to do it only per question. I am not part of our technical team, but I need to know what the possibilities are. Perhaps there is something I am missing that can easily implement this.

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**Author:** ![j3parera](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.openedx.org/j3parera/32/5570_2.png) [@j3parera](https://discuss.openedx.org/u/j3parera)\
**Post date:** [July 27, 2023, 8:21pm UTC](https://discuss.openedx.org/t/numerical-input-problem-limitations/9975/2 "2023-07-27T20:21:44Z")

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Hi Roline,

Take a look at [MITx grading library](https://mitodl.github.io/mitx-grading-library/). It has lots of useful grader extensions: string, formula, numerical… I hope it helps.