$\sqrt{5x^2}$

$4\left(\sqrt{5}\sqrt{2}\right)\left(\sqrt{5}\sqrt{2}\right)$

$\lim_{x\to0}\left(1-1x\right)$

$\int\left(\frac{2x^3}{\left(2x+1\right)^{\frac{-1}{3}}}\right)dx$

$2x+3\le19$

$\int_0^4\left(\frac{x^2+x+1}{\left(x+1\right)^2+\left(x+2\right)}\right)dx$

$\frac{x^2+x}{6x^2+x}$