This is LaTeX code:
[latex]
x^2 - \left( {\frac{1} {2} - \frac{2} {{\pi ^2 }}} \right) - \frac{{x - \frac{1} {2}}} {{\frac{1} {{2\pi }} - \frac{4} {{\pi ^3 }}}}\left( {\frac{1} {{2\pi }} - \frac{4} {{\pi ^3 }}} \right)
[/latex]