$\left(x+\frac{2}{9}\right)^2$

$5b^2-23b+12$

$\left(\frac{2}{3}\times\frac{5}{4}\right)^{0}$

$4cos^2x+cosx-5$

$\frac{dy}{dx}+\sec\left(x\right)y=\cos^2\left(x\right)$

$\lim_{x\to-\infty}\left(\frac{x}{x+1}\right)^{\frac{x^2}{2x+2}}$

$\left(-x-5\right)\left(-x+6\right)$