$\left(\cos\left(x\right)^2-1\right)\left(\csc\left(x\right)^2-1\right)$

$x^3-3x^2+2x$

$24x^2-32x+33x-34$

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

$\frac{dn}{dt}=n\cdot0.5$

$1+yx+x^2\frac{dy}{dx}\:=\:0$

$n\left(n-1\right)\left(x-1\right)^n$