High school mathematics is solved by college mathematics.
Convenience is of course, just like looking at junior high school topics with high school knowledge. However, "Advanced Mathematics" in universities needs a foundation, which is somewhat abstract, and its content is of little help to the college entrance examination. Advanced mathematics, calculus, linear algebra, etc. , is out of reach in high school. You can learn high school knowledge well, but you can also get in touch with it if you are interested.