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

$-9\cos\left(\frac{17}{5}\pi\right)+7$

$\left(x^3y^2\right)^4.\left(x^4y\right)^{-1}$

$\left(3x^2+5y\right)^2$

$\frac{sin\left(\theta\:\right)}{tan\left(\theta\:\right)}$

$\left(-3x+2y\right)\left(-6x+y\right)$

$\int_0^{9\sqrt{3}}\left(\frac{25}{\sqrt{324-x^2}}\right)dx$