Tencent.com。 According to relevant information, the video explanation of senior high school mathematics 126 can be watched on Tencent. Senior High School Mathematics 126 is a teaching column of mathematics explanation introduced by Tencent.com on 2018. There are many detailed explanations from senior teachers in the column. As of June 4, 2023, it can still be viewed on Tencent. com's search crown detection high school mathematics 126 recruitment network.