Activity for Marcelo Forets
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Marcelo Forets posted a comment on ticket #3340
huh, sorry for the code misalignment... what you see is Not what you get :) i don't find a button to edit the ticket's description.
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wrong exponential integral of arccos
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ooops.. posted the wrong link! See also: https://trac.sagemath.org/ticket/21440
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Incorrect integral of rational expression of trigonometric function
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