SymPy Gamma

SymPy:

integrate (x**2/(x**2+1),x)

$\int \frac{x^{2}}{x^{2} + 1}\, dx$

integrate(x**2/(x**2 + 1), x)

Plot:

plot(x - atan(x))

Roots:

solve(x - atan(x), x)

$x =$

diff(x - atan(x), x)

$\frac{d}{d x} \left(x - \operatorname{atan}{\left(x \right)}\right) =$

series(x - atan(x), x, 0, 10)

See what Wolfram|Alpha has to say.

Experiment with SymPy at SymPy Live.