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member since | 2011-03-22 09:28:58 +0100 |

last seen | 2013-03-20 13:03:19 +0100 |

todays unused votes | 30 votes left |

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2 ● Student
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● Self-Learner × 1 ● Nice Question × 1 ● Popular Question × 4

● Teacher × 1 ● Good Question × 1 ● Supporter × 1

● Self-Learner × 1 ● Nice Question × 1 ● Popular Question × 4

- mistake in a indefinite integral
- can gridlines be painted at sqrt(2) ?
- strange way to simplify square roots
- using 'R' in sage: can not plot. errors of X11 and PNG

● Teacher × 1 ● Good Question × 1 ● Supporter × 1

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