$12\cdot5\cdot7\cdot6$

$\left(n-3\right)\left(n+5\right)$

$\frac{dx}{dy}=\frac{\left(y-1\right)\left(y+3\right)}{\left(x+4\right)\left(x-2\right)}$

$\left(-19\right)\:-\:\left(-20\right)$

$5x^3\left(8x^5y-\frac{8}{3}x^3y^2\right)$

$3x-2>-6$

$\cos^2\left(x\right)=\sin^2\left(x\right)+\cos\left(2x\right)$