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I tried making a new type of video. Or rather, I think it would be better to say that I haven't been able to establish my own editing or video style because I upload videos too infrequently. Yobinori's Substitution Integral Video: • [High School Math] The Essence of Substitution Integral [Math III (Integration)] Twitter / 0711__hs Subchannel / @Humble Mathematician's Secret Account I borrow the audio from here. Maoudamashii OtoLogic