$\csc\left(x\right)\sin\left(2x\right)-\sec\left(x\right)\cos\left(2x\right)=\sec\left(x\right)$

$\frac{d}{dx}\left(\frac{\left(3x+9\right)^2}{\left(x+3\right)}\right)$

$\int\left(\frac{3x^2}{\sqrt{5-6x^3}}\right)dx$

$x\left(x-9\right)\left(x-4\right)$

$\int\frac{5}{\left(x+1\right)}dx$

$\left(4x-6\right)x\left(3x-5\right)$

$10\left(x-3\right)-12x+4x\left(x-3\right)=0$