9a990bf942 · feat: 新增变限积分章节（要点11-15，含Leibniz公式/绝对值处理/奇偶性） · Updated 2026-05-24 15:33:10 +08:00
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?