$$m^2-2m-8$$

$$\left(4-9\right)\left(5+1\right)$$

$$\frac{a^2+3^3+2}{a+1}$$

$$\sqrt[x]{-3125}\:=-5$$

$$\left|7-\left(6-2\right)\right|-\left(3-11\right)$$

$$4y+6x-2y$$

$$\lim_{x\to-2}\left(\frac{25x^2-36}{5x+6}\right)$$