@[lzy20091001](/user/932039)
我也见过他，在你复制公式的时候比如
$$e^x=\sum_{n=1}^\infty(\frac{x^n}{n!})$$
复制我的公式，你就会看到他……
by xpg007 @ 2024-04-27 16:13:03
by XuYueming @ 2024-04-27 16:38:29
by lzy20091001 @ 2024-04-27 16:58:11
by 7_Cristiano_Ronaldo @ 2024-04-27 17:36:25
by cmpt_xiaoxiao @ 2024-04-27 17:41:36
by M_rryao @ 2024-04-27 18:02:08
by Alexxu2024 @ 2024-04-27 18:26:58
by Laoda_Bryant @ 2024-04-27 21:53:21
by zjx331 @ 2024-04-28 16:58:54
[](http://www.bilibili.com)
by WydnksqhbD_3 @ 2024-04-29 17:28:06