$-22-\sqrt{-169}$

$x^2+5x+6\left(\frac{1}{4}\right)$

$-765\cdot2541\cdot445$

$\frac{2}{3}x+\frac{1}{2}=\frac{31}{6}$

$\left(\pi-0\right)\cdot\left(\frac{\infty-0.01744455}{2}\right)$

$\left(\frac{2}{5}f+\frac{1}{5}\right)\left(\frac{1}{5}f-\frac{2}{5}\right)$

$-15t\ge-45$