$\left(y^{\frac{-1}{2}}\right)^4$

$\left(\frac{2x}{5}+\frac{7}{5}\right)\left(\frac{2x}{5}+\frac{7}{5}\right)\left(\frac{2x}{5\:}+\frac{7}{5}\right)$

$\cos2\left(\theta\right)+\cos\left(\theta\right)+1=0$

$x.x.3.3.xy.x^2$

$5m^3-15m^4+\:10^5$

$\frac{dy}{dt}-y=e^{3t}$

$\csc^2x+1=-\cot^2x$