VisualEditorTest

Main Header

some header

nalala

another header

blala

any header

en end ene

$L(F(x))=\frac{\underset{-\mathrm{\infty }}{\overset{x}{\int }}tf(t)dt}{\underset{-\mathrm{\infty }}{\overset{\mathrm{\infty }}{\int }}tf(t)dt}=\frac{\underset{-\mathrm{\infty }}{\overset{x}{\int }}tf(t)dt}{\mu }$