# Trying to create self-checking graphs/equations. Latex is not matching

**URL:** <https://cl.desmos.com/t/trying-to-create-self-checking-graphs-equations-latex-is-not-matching/830>\
**Category:** Questions\
**Created:** [April 12, 2020, 8:55pm UTC](https://cl.desmos.com/t/trying-to-create-self-checking-graphs-equations-latex-is-not-matching/830 "2020-04-12T20:55:47Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![Daniel\_Grubbs](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/daniel_grubbs/32/719_2.png) [@Daniel\_Grubbs](https://cl.desmos.com/u/Daniel_Grubbs)\
**Post date:** [April 25, 2020, 6:30am UTC](https://cl.desmos.com/t/trying-to-create-self-checking-graphs-equations-latex-is-not-matching/830/10 "2020-04-25T06:30:12Z")

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Try this thread.

> [@Checking Text Answer in CL](https://cl.desmos.com/t/checking-text-answer-in-cl/475/10):
>
> If student input is exp1b, you could try using parseEquation, differenceFunction, and evaluateAt. It’s probably a good idea to create a single variable/boolean to check in your note. For example: #This creates an expression of the left-hand side minus the right-hand side with variables x and y. checkThis=parseEquation(exp1b).differenceFunction(“x”,“y”) #This creates a true/false boolean by checking 2 correct solutions to the function check=checkThis.evaluateAt(1,2)=0 and checkThis.evaluateAt…

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