Comments by "Mateusz Cielas" (@mateuszcielas3362) on "Why Hagoromo Chalk Is So Expensive | So Expensive | Business Insider" video.

  1. why mathematicians prefer blackboards?
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  2.  @al6243 okk makes sense
    1
  3.  @l.n3187  kk
    1
  4.  @woosix7735  nobody get stain of marker
    1