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How to study Free Online University
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OpenLearn Free Learning from The Open University
The Open University
Money & Business
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Skills for work - Skills for study
výzkum - science - reserch
https://cs.wikiversity.org
Wolfram Mathematica
www.wolfram.com/mathematica
www.wolframalpha.com/?source=nav
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Number Empire - Math tools
Graphing Calculator
Graphing Calculator (graph plotter tool) draws graphs of the given functions
www.xignite.com - data
http://resources.xignite.com/h/c/190077-xignite-blog
https://cs.wikiversity.org/wiki/Kategorie:Software
calculators
www.lenntech.com/calculators/calculators.htm
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