Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

[EX Q]: What type of math was not advanced during Zhu Shijie's time no scratch that I want to know what modern math concept did Zhu Shijie do work similar to?
[EX A]: What modern math concept did Zhu Shijie do work similar to?

[EX Q]: What happens or like instead why does a lower level of economic growth occur due to high-end consumption?
[EX A]: Why does a lower level of economic growth occur due to high-end consumption?

[EX Q]: What is not a cause of immune surveillance no tumor antigens?
[EX A]:
What is not a cause of tumor antigens?