This web application was created by using Django which is a Python-based free and open-source web framework.
The code of the calculation examples currently used in this web application is based on the work of Hans Petter Langtangen, who was a Norwegian scientist trained in mechanics and scientific computing.
Testing the app...
x = 5
[123, 4242, 12313, 'ABC']
$$g(x) = \frac{1}{x}$$ $$f(x) = x^2$$ $$g(x) = \frac{1}{x}$$ $$F(x) = \int^a_b \frac{1}{3}x^3$$