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>> DIRECT DOWNLOAD LINK 🎞️ #1 <<

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http://youtube.com/watch?v=PpKorcy1-5E

Math for fun #16.5, differentiating ln|x|, • tricky math problem: if f(x)=ln(x), then f'(-2)=? • more math for fun:    • Плейлист   • integral battles (just as fun):    • integral battles!   • • blackpenredpen • follow me:   / blackpenredpen  , • bprp fb group:   / blackpenredpen  

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