testing mermaid and latex rendering

inline math: $e^{i\pi} + 1 = 0$ and $a_1 + b_2 = c$

block math:

\[\int_0^\infty e^{-x^2}\,dx = \frac{\sqrt{\pi}}{2}\]

flowchart:

graph LR
  A[startup] --> B[sells to startup]
  B --> C[customer grows]
  C --> D[you grow]

sequence:

sequenceDiagram
  Founder->>Startup: demo
  Startup-->>Founder: ok lets try it