User:Rii'jeg'fkep'c/mathem

Because Wikipedia blocked by GFW(the Great firewall of China), I can't creat the page User:Rii'jeg'fkep'c/mathem in my simple English Wikipedia. So I write mathematical formula in here.

Basic calculation

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Sequence

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Equations

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Geology for calculation

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pythagorean theorem

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Descartes' geology

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number e

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Logarithm

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Arrangment and combination

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Derivative series

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Tends to infinitesimal

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