Word自带公式编译器的\eqarray () 换行@、编号#（）、对齐&等

• https://zhuanlan.zhihu.com/p/690249435
• https://zhuanlan.zhihu.com/p/439988361
• https://blog.csdn.net/qq_43874317/article/details/130170680
• https://www.cnblogs.com/rainbow70626/p/18639796
• https://support.microsoft.com/en-us/office/linear-format-equations-using-unicodemath-and-latex-in-word-2e00618d-b1fd-49d8-8cb4-8d17f25754f8?ui=en-us&rs=en-us&ad=us