$f\left(x\right)=\frac{4x}{1-x^3}$

$\frac{5x-17}{-4}=-7$

$\frac{16a^2x^3}{8ax^3}$

$x^2+1x-600$

$\sin x\sin ydx+\cos x\cos ydy=0$

$csc2\left(x\right)=\frac{sec\left(x\right)csc\left(x\right)}{2}$

$\frac{4\left(\cos\:\left(\theta\:\right)+1\right)}{2\sin\:\left(\theta\:\right)+\sin\:\left(2\theta\:\right)}$