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Hello, Langing, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

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Square root

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Se WP:LEAD about the requirements for the lead of an article. Basicially it introduces the topic and should be quick and easily read. WP:MOS and WP:MOSMATH are manuals of stytle generally and for maths. Wikipedia is supposed to be an encyclopaedia rather than a textbook or a tutorial. Dmcq (talk) 19:52, 4 May 2011 (UTC)Reply