$\left(\frac{x}{\sqrt{n}}+\frac{\sqrt{n}}{x}\right)^2$

$-34b^4-3b^3+b+2b^2$

$\frac{1}{1}^{000000000000000000000000000000000000000000000000000000000}$

$5.5r+3.2r$

$\frac{20}{x-3}=\frac{80}{x+3}$

$y'=-\frac{\left(cosx\right)y}{senx}$

$-3\left(2\frac{a^2}{6}\right)^2\left(\frac{5}{2b^2}\right)$