I write it in chinese and tranlate it using AI. Hope it is usefull to you.

Here we introduce a new mathematical symbol which name is "undetermined sign" to represent a relational symbol that needs to be determined. We use it to directly connect two numbers that to be compared, resulting in a new inequality. In this way, we can use the properties of inequalities to simplify itand get the answer. It simplifies the problem-solving process.

Examples

Example 1

https://preview.redd.it/vlerio0er4yg1.png?width=705&format=png&auto=webp&s=84262f7f891db878125daaac4bf146d1bcd11f54

Example 2

https://preview.redd.it/l03uje9gr4yg1.png?width=729&format=png&auto=webp&s=60b2b81d06d2b4c69710eb36ca49bbc00c08d251

The undetermined sign consists of two parts, top and bottom, and negation is represented by swapping the positions of the top and bottom parts.

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