In fact, LaTeX is very useful, especially for students majoring in data science. However, it takes half a day to check LaTeX's mathematical conformity every time. Let me make one myself. Here are the commonly used mathematical symbols LaTeX.

You can refer to:

There is only one equal sign above, so what should students do if they want to get an unequal sign?

As long as you add \not before all equibinary relations, you can realize inequalities.

Press: \ Right Arrow