Remote-Wallaby-6943 | 1 points | May 17 2022 11:23:50

来做题

https://v.redd.it/lstwofhmt0091

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[-] T_z_QAQ | 1 points | May 17 2022 11:41:01

x=0,y=7和y=0,x=7，一眼就看出来的弱智题，给我来点偏微分方程解解试试