1. Duplicate checking formula?
Generally speaking, the formulas will not be checked when the paper is duplicated, because many formulas are definite and cannot be modified, so once they are duplicated, they will be exactly the same, resulting in a high duplication checking rate, so the formulas in the paper will not be duplicated. At present, many paper duplicate checking systems can't identify the content of the formula. Generally, when writing a paper, they will edit the formulas involved in the paper in a special way, so they can't identify them. Even the internal duplicate checking system required by the school, after years of technical development, has not solved the problem of not being able to identify the formulas in the paper, so it will not check the formulas in the paper.
Second, besides the formula, what else is unrecognizable.
Now, in addition to formulas and other contents that cannot be identified and copied, there are also contents in picture format and table format. So now many people will seize this loophole and convert the content that failed in repeated search in their papers into picture format and insert it in the corresponding position in the papers. This will not only avoid repeated search of papers, but also effectively reduce the repeated search rate of their papers. However, this method cannot be used many times. It is enough to use a paper once or twice, otherwise it is likely to be passed by your tutor. If you just want to reduce the duplicate checking rate of papers, then it is most reliable to reduce the duplicate checking rate of papers by original methods.