$\left(x^{0.5}-1\right)\left(x^{0.5}+1\right)$

$\int\:\frac{x^4}{\sqrt{\left(1-x^{2\:}\right)^{2\:}}}dx$

$\lim_{x\to\infty}\left(\frac{-2x^2+4x+3}{x^2-2x-1}\right)$

$\lim_{x\to\infty}\left(\sqrt{4x^2+35}-2x\right)$

$+\frac{133}{+19}$

$m^2+3m-3=0$

$\sqrt[4]{625.x^5}$