Found with Windows 11 Character Map utility:
· º ÷ Θ Φ ƒ Σ μ ₁ ₀ ₂ ≈ ≤ ≠ ≥ √ ≡ ∞ ꜛ ϖ ± ² ⁿ ³ ⁺ ⁻ ⁽⁾
feel free to add more...
Copy and paste as required, see below:
EV=log₂(N²/t) where EV=exposure value, N=ƒ/number and t=shutter time
P.S. On this site, Greek letter pi above renders wrong ϖ , found this instead: π
Hm=(π/4)·0.823·L·t/N² derived from ISO SOS definition where Hm = mean exposure lux-sec and L = scene luminance cd/m²