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

$y'-3000ky=-ky^2$

$2\:+\:3\:x\:10$

$16x^6-6x^4+24x^2-40x^5+32x^3$

$y\cdot\frac{dy}{dx}=x\left(y^2+4\right)$

$-n^2+2n-4$

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