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<math>\pi=\frac{3}{4} \sqrt{3}+24 \int_0^{1/4}{\sqrt{x-x^2}dx}</math> | |||
<math>\sqrt{1-e^2}</math> | |||
[http://authors.library.caltech.edu/view/types/book.html Open access books from Caltech] | [http://authors.library.caltech.edu/view/types/book.html Open access books from Caltech] | ||