=== HTML ===

Math

Inline radiation: $E = h ν$ redshifted by $\sqrt{g_{t t}}$ .

E = h ν \sqrt{g_{t t} (r)} = konst. (1)

The metric reads $d s^{2} = - g_{t t} (r) c^{2} d t^{2} + d r^{2} + r^{2} d Ω^{2}$ , and a photon loses energy as $\frac{E (t)}{E_{0}} = e^{- H t}$ .

1 + z = \frac{ν (r_{1})}{ν (r_{2})} = \sqrt{\frac{g_{t t} (r_{1})}{g_{t t} (r_{2})}} . (2)

Prices are not math: the ticket costs $5 and the guide $10 per group.

The metric in prose right above its display form

g_{t t} (r) = 1 - \frac{r_{s}}{r}

continues in a sentence after it.

r_{h} = \frac{σ}{\sqrt{2 π G ρ_{amb}}}, M_{h} = \frac{2 σ^{2} r_{h}}{G} . (7)

An equation broken across lines keeps its prose out of mathematics $\nabla^2 h = (8\pi/\kappa a)u$: the binding is the force of a cell $κ a = c^{4} / G$ , and the source is the energy.

\raisebox 1 e m E = h ν

Inline degradation too: $\raisebox 1 e m E$ stays visible where it stands.

=== TOC ===

Math