$\csc2\theta=\frac{1}{2}\csc\theta\sec\theta$

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

$\int\frac{1}{x^2-2x+10}dx$

$\frac{70\frac{\left(4x-3\right)-\left(8x+9\right)}{4x}}{\frac{4x}{4x}}$

$36x^2-25=0$

$\frac{d^2}{dx^2}\left(-2sin\left(x\right)\right)$

$\int\frac{1}{\sqrt{x}\left(\sqrt{x}-1\right)}dx$