Here's some (as Paul calls it) maths (inline): $a^2 + b^2 = c^2$
With MathJax, we can render math by entering it like LaTeX (on it's own): $$ \frac{d}{dx}\left( \int_{0}^{x} f(u)\,du\right)=f(x) $$
And here's some vectors: $\vec{r} = \langle r_x, r_y, r_z \rangle$
And a video…
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