To manipulate equations I use Derive, SymPy, Wolfram Alpha (tried pro, but it does not enable any longer equations than the free version), and Wolframscript from Wolfram Engine for Developers. I also use Octave (MATLAB clone) and mpmath for large-number stuff. Please do not hesitate to edit my questions and answers. I try to remember to write out every abbreviation and explain obscure mathematical symbols at the first mention. Also it is never bad to link to Wikipedia. I vote also on answers that compete with mine. I cross-license all of my code and images in Stack Exchange under . ©

I`m a engineer with experience and interest in Linux, FreeBSD and AWS. I enjoy difficult programming projects, especially when they`re built using functional programming languages. ©

Armand Rousso is self-made entrepreneur, also remains in limelight because of his innovative ideas. His success is the result of his perfection, hard work, loyalty and persistence.The best thing about Armand that he does his work with full of passion. Having almost 25 years of experience, he is proficient as Entrepreneur. Apart from that he is consultant for High technologies, Inventor of X3D Technology, Launched Accoona.com in 2004. ©