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Error in variable testing condition
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To account for errors made by the student in earlier calculations, replace question variables with answers to earlier parts.
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The variable replacements you've chosen will cause the following variables to be regenerated each time the student submits an answer to this part:
These variables have some random elements, which means they're not guaranteed to have the same value each time the student submits an answer. You should define new variables to store the random elements, so that they remain the same each time this part is marked.
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Define rulesets for simplification and display of mathematical expressions.
Add styling to the question's display and write a script to run when the question is created.
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