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Fri, Sep 18 07:23 AM

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Show HN: A Mac native app that helps you reason through math/CS pdf textbooks

Hacker News•Fri, Sep 18, 2026, 05:01 AM•2 min read

https://marginstudy. lemonsqueezy. com/checkout/buy/b71656b9-b...

Source: [Hacker News](https://marginstudy.lemonsqueezy.com/checkout)

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