Test MathJax

Test link

Test inline \(\frac{1}{x}\) formula

sfdfs \(\frac{1}{x}\) sdfsd

Test standalone

$$\begin{align} Y_{i,1}&=X_i-\sqrt{Xi} \ Y{i,2}&=\sqrt{\sqrt{X_i}}-\sqrt{\sqrt{\sqrt{X_i}}} \end{align}$$