$\frac{dy}{dx}=\frac{1}{1-\cos\left(x\right)}$

$\int\frac{\left(9sin\left(6x\right)\right)}{cos^6\left(6x\right)}dx$

$\left(x-y\right)\left(x+y\right)=x^2+2xy+y^2$

$\left(\cos\theta+1\right)\left(\sec\theta+1\right)$

$x\sqrt[3]{25x}$

$\left(-3\right)\left(-12\right)\left(-5\right)-\left(-25\right)$

$\left(ax\right)\left(ay\right)$