$\lim_{x\to0}\:\frac{\left(e^{-x}-1-\frac{x^2}{2}\right)}{x}$

$\lim_{x\to\infty}\left(\frac{1-\sqrt{x}}{1+\sqrt{x}}\right)$

$\left(\frac{1}{2}a^2-\frac{3}{4}b^4-c^3\right)^2$

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

$0,25m^3,\:0,75m^3,-\:1,2\:-\:\:1,4m^3,-\:0,8m^32,1m^3$

$a\:x\:6^2$

$x\left(3x\:-1\right)\:-20\:<\:2\:\left(3x+1\right)$