$$\left(mn\right)^8$$

$$-\sec^2\left(x\right)-4\sec\left(x\right)-1=0$$

$$216x^3\:+\:8$$

$$-\left(11\right)\left(-11\right)\left(-11\right)$$

$$\frac{7}{8}w=\frac{1}{2}w+\frac{3}{4}w$$

$$\frac{x^5-x^4+x^2-2}{x^2+1}2$$

$$\frac{x^4+11x^3+33x+24x+32}{x+6}$$