User:Miho2009

Ü5
$$ x_{1,2}= - \frac p 2 + {\sqrt{ \frac{p^2} 4 -q}} $$

$$ \exp\left(-\frac 12\left(\frac{x-\mu}\sigma\right)^2\right) $$

$$\sqrt{x^2+2x+1}=|x+1| - \left(\left(\frac{2x^2}{x}\right)^2\right)^2$$