$\sqrt{3by^2}$

$3xy^2.5x^2y^3$

$\lim_{x\to0}\left(\frac{sinx}{x\left(2x+1\right)}\right)+\left(\frac{tanx}{x\left(2x+1\right)}\right)$

$\left(4sin\theta\:-4cos\theta\:\right)^2=16-16\:sin2\theta\:$

$\int_0^2\left(\frac{x+2}{x^3}\right)dx$

$\left(16r\right)^{-\frac{1}{4}}$