This is the 1430th most frequent Chinese word.
以外
"以外" means "beyond," "outside of," or "except for."
Here '以外' is used to indicate something other than studying.
除了学习以外，我还喜欢阅读书籍。
Besides studying, I also enjoy reading books.
The phrase '以外' is used to denote an exception—math in this case.
他除了数学以外，其他科目都擅长。
He is skilled in all subjects except for mathematics.
In this context, '以外' references others not included within the specified group.