$-4n^2-2-n^3-2n\:para\:n=-3$

$cos\left(\theta\:\right)cos\left(2\theta\:\right)+sin\left(\theta\:\right)sin\left(2\theta\:\right)=\frac{\sqrt{3}}{2}$

$319+1004+12.319$

$\left(4m\:-\:3n\right)^2$

$\csc\:2\:x-1=0$

$\left(2xy^2-3\right)dx+\left(2x^2y+y\right)dy=0$

$\frac{d}{dx}\frac{5}{x}+\frac{x}{5}$