$n^2+3n=10$

$\frac{dy}{dx}\left(-\frac{4}{x^5}y\right)$

$s^2+16s+49=0$

$3\left(2+5x\right)\:\:\:\:x=3$

$-\frac{12}{7}ab+\frac{1}{2}ba-\frac{3}{14}ab+2a$

$t+sin\left(t\right)cos\left(t\right)-tcos^2\left(t\right)-tsin^2\left(t\right)-sin\left(t\right)cos\left(t\right)t$

$\frac{dy}{dx}=\frac{2xy}{\left(1+x^2\right)^2}$