$7y\:-\:4y\:=18\:$

$20m-\frac{1}{5}>\frac{m}{2}$

$\lim_{x\to\frac{\pi}{3}}\left(\sin^2\left(x\right)-\tan^2\left(x\right)\right)$

$\left(3x-5\right)\left(9x^2+15x+25\right)$

$\frac{d}{dx}4\arccos6x^5$

$2\left(7v-8\right)+6\left(4v+6\right)$

$\frac{dy}{dx}+\frac{4y}{x}=\frac{x^3-1}{x}$