You have an extraordinarily high class technique like that, huh?
My son is still an elementary school kid, but he is studying high grade mathematics at a cram school.
Please tell me about higher education in your country.
When you are higher than equal, you are above the very top, you are above everyone. You are high class.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.