Integrals

[includealex]

We can now implement integrals using Simpson's rules:
$$\int_a^b f(x) dx \approx \frac {b - a}{6} \cdot [f(a) + 4f (\frac{a + b}{2}) + f(b)]$$
or
$$\int_ a^b f(x) dx \approx \frac{b-a}{8} \cdot [f(a) + 3f (\frac{2a + b}{3}) + 3f(\frac{a+b}{3}) + f(b)]$$

@Graur what do you think about having integral object in eo-math?

[Graur]

@includealex I like this idea, go ahead

[0pdd]

@includealex the puzzle #96 is still not solved.

[0pdd]

@includealex the puzzle #129 is still not solved; solved: #96.