$5sin\left(y\right)\frac{dy}{dx}=cos\left(2x\right)$

$\lim_{x\to-2}\left(\frac{|x+2|.}{x^2-4}\right)$

$9.8^2$

$\frac{7m}{13}\left(\frac{13m}{17}+\frac{17n}{3}\right)-\frac{3n}{7}\left(7+\frac{7m}{13}\right)$

$\frac{\left(x-2\right)}{5}+\frac{x}{10}=\frac{1}{2}$

$9-12t+4t^2$

$\left(\frac{d^3}{9w^5}\right)^{-2}$