$$y^2\:+\:11y\:+\:30.25$$

$$\left(\:xc\:+\:3yu\:\right)\left(\:xc\:+\:7yu\:\right)$$

$$\int\frac{-2x+8}{x^2+x-2}dx$$

$$\left(\frac{1}{6}\right)^{-1}$$

$$8x^2-3x+5x-5x^2$$

$$2\left(3x-1\right)>6x-5$$

$$\lg^{2}\left(\frac{t}{4}+\frac{x}{2}\right)$$