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A problem by barnes kakra

Level pending

1001^2-1=?

1000002 1020000 100200 1002000

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Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 5 million people

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including olympiad champions, researchers, and professionals.

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by barnes kakra

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