$$4\ge3x+5$$

$$3a+5-x+7x-2a$$

$$\lim_{x\to\infty}\frac{x-4}{x^2+4x+4}$$

$$\left(q+7\right)\left(q+10\right)$$

$$\int_6^{\infty}\left(\frac{5cos\left(\frac{\pi}{x}\right)}{x^2}\right)dx$$

$$-a\:+\:7,1a\:+\:2a\:-\:3,5a$$

$$\frac{4a\left(5ab^2\right)}{2}$$