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

$$\left(8a\:\:+\:7b\:\:\right)\left(\:8\:a\:-\:7b\right)$$

$$123\cdot25$$

$$\frac{d}{dx}\left(\arcsin\left(x^2\right)\right)$$

$$\left(-8x+3\right)^2$$

$$-2-1+-65$$