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| Nice to meet you. I have a question about wolfram workbench. I want to talk to you in private. My email address is 1262043385@qq.com |
| code: FreeQ[\[Lambda]^i, i] ! FreeQ[2 \[Lambda]^i, i] output: False True reset Sum : a3 = Attributes[Sum]; Unprotect[Sum]; ClearAttributes[Sum, a3]; Attributes[Sum]; Sum[f_ g_, i_] := f Sum[g,... |