$$-13y^5\left(-9x^3y^2\right)$$

$$\frac{\left(6z^6\right)^3}{z^{-3}}$$

$$m^4+50m^2+100$$

$$\lim_{x\to\infty}\left(\frac{x^5+4}{x^5-5}\right)$$

$$\left(7f\:-\:5\right)^2\:\:\:\:\:\:\:\:$$

$$24-5\left(-6+3\right)$$

$$h ( t ) = \sqrt { t } ( 1 - t ^ { 2 } )$$