$x\frac{dy}{dx}=-10y$

$\left(2x^2+3\right)\left(4x^2+5\right)\left(5x^2+8\right)$

$\lim_{x\to4}\left(\frac{x^3-2x+56}{x^2-x-20}\right)$

$2^2+6x+8x^3-12x^4$

$\sqrt{0.27}$

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

$2x^2-450=0$