$x\left(n-3\right)+y\left(n-3\right)$

$\left(a^{3}+b^{3}\right)+-8\left(a^{3}-b^{3}\right)$

$\lim_{x\to0}\left(\frac{5\:\ln\left(x\right)}{3x^{-1}}\right)$

$\left(\frac{4}{x+2}\right)+\left(\frac{1}{x-2}\right)=\frac{5x-6}{x^2-4}$

$12m^2-40m+25$

$\frac{3\left(1+x^2\right)dy}{dx}\:=\:2xy\left(y^3-1\right)$

$\sin\left(x\right)\left(\csc\left(x\right)-\sin\left(x\right)\right)=\frac{1}{\sec^2\left(x\right)}$