$\frac{d}{dx}\ln\left(\sqrt{\frac{a^2-z^2}{a^2+z^2}}\right)$

$\int\frac{3x^3-4x^2+5x+6}{3x+2}dx$

$\frac{dy}{dx}\left(e^{xy}-x^2+\frac{x}{y}+y=0\right)$

$\sqrt{\left(x+2\right)\left(x+8\right)-\left(x+5\right)^2+\:13}$

$y=x^2+x-3$

$k\:+\:2y\:+\:5k\:-\:10y$

$0,52\cdot9,2$