$\frac{sin\left(x\right)}{cos\left(\frac{\pi}{2}-x\right)}$

$\frac{d}{dx}\left(xln\left(y\right)\right)$

$\frac{x^2-7x+2}{x-5}$

$\frac{-176-80}{64}$

$\left(4n+5\right)\left(3n-2\right)$

$\frac{dy}{dt}=\frac{4e^{-2t}}{y^{-2}}$

$e^x\left(\cos\left(y\right)dx-\sin\left(y\right)dy\right)=0$