Math (KaTeX)
Inline math like e^{i\pi} + 1 = 0 sits in a sentence. A price of $5 stays plain text.
\int_0^\infty e^{-x^2}\,dx = \frac{\sqrt{\pi}}{2}
\sum_{k=1}^{n} k = \frac{n(n+1)}{2}
Inline math like e^{i\pi} + 1 = 0 sits in a sentence. A price of $5 stays plain text.
\sum_{k=1}^{n} k = \frac{n(n+1)}{2}