interesting site with math tools

Came across this site this morning which provides some usefull mathematical tools. It was useful for me to check a derivative of a function.

Other topics include:

Derivative calculator
Integral calculator
Definite integrator
Limit calculator
Equation solver
Expression simplifier
Factoring calculator
Expression calculator
Inverse function
Taylor series
Matrix calculator
Matrix arithmetic
Prime numbers
Number factorizer
Fibonacci numbers
Bernoulli numbers
Euler numbers
Complex numbers
Factorial calculator
Gamma function
Combinatorial calculator
Fractions calculator
Statistics calculator
LaTeX equation editor
Graphing calculator

(and yes there are a lot of ads too)

That's very useful indeed.

Now I only need a webserver chip that I can plug into my head.