$y''+16y=0$

$\frac{\cos\:\left(4\theta\:\right)+\cos\:\left(2\theta\:\right)}{\sin\:\left(4\theta\:\right)+\sin\:\left(2\theta\:\right)}=\cot\:\left(3\theta\:\right)$

$x^{\left(5\right)}+\:x^{\left(4\right)}-2x^{\left(3\right)}-2x^{\left(2\right)}+x+1$

$13z+5+2z\quad5\left(3z+1\right)$

$\frac{6x^3+3x-1}{x^3-1}$

$m^3n^{-4}\left(m^{-6}n^{-1}\right)$

$\int sin\left(3x\right)cos\left(x+2\right)dx$