$\left(\frac{\pi}{2}\right) \left[\left(\frac{1}{\pi}\right) + 1\right] - \frac{\pi}{2}$

$\sin^2 1^\circ + \sin^2 2^\circ + .... + \sin^2 {89}^\circ$

$\sqrt{2}\left(3\sqrt{2} - \frac{4}{\sqrt{2}}\right) + \sqrt{3}$

$\frac{\left(\sqrt[3]{729}\right)}{3} + \frac{22}{7}$

$(4 - \pi)[1 + \left(\frac{\pi}{4}\right) + \left(\frac{\pi}{4}\right)^2 + \left(\frac{\pi}{4}\right)^3 + ...$ (infinite terms)]