$$5^3\cdot125$$

$$\left(\frac{-4}{3}xy^{3}z\right)\left(\frac{9}{8}x^{5}yz^{2}\right)\left(\frac{-5}{6}xy^{4}z^{4}\right)$$

$$\left(x^2-1\right)\left(x^2+x\right)$$

$$\left(y^2+1\right)-y^2$$

$$4.64^2$$

$$\lim_{x\to1}\left[\frac{x-1}{\sqrt{x}-1}\right]$$

$$\frac{9x^2+9}{-x+5}$$