Online tools for mathematics

In this page i keep my favorite links for online mathematics tools:

Wolfram – Alpha:

One of my favorite sites. You can use it to visualize functions, solve equations etc

https://www.wolframalpha.com/

Two great sites for calculations for matrices:

http://www.bluebit.gr/matrix-calculator/

http://www.dotnumerics.com/MatrixCalculator/default.aspx

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