Just Some Equation

MathJax works on this blog. Proof: Define

$$\Phi(x):=\frac{1}{\sqrt{2\pi}}\int_{-\infty}^x\exp\{-\frac12 z^2\}dz,$$

and thus

$$\mathcal{D}\Phi(x)=\frac{1}{\sqrt{2\pi}}\exp\{-\frac12 x^2\}.$$

QED