$$-6-\left[5-\left(4\right)\right]$$

$$5,762\:+\:-9$$

$$\left(5x-1\right)\left(7x+2\right)$$

$$\lim_{x\to\infty}xsin\left(6\pi x^{-1}\right)$$

$$\sqrt[3]{a}+\sqrt[3]{b}+\sqrt[3]{c}=0$$

$$\frac{x^2+6x+2}{x^2-3}$$

$$2x\:+\:8\:-\:3y\:-\:6x\:-\:8y\:+\:6$$