2. If it is a function-like macro, it is only expanded if the next token is an left
parenthesis.
如果它是一个类似于函数的宏,则仅当下一个单词为左括号时对其进行展开。
3. To insert the equation number without
parenthesis around it, choose Numbering under Format instead of Reference.
如果插入没有括号的编号,请在插入引用中选择编号替代引用。