$\left(10x^2\:+\:11y^3\right)^2$

$y\left(x+1\right)\frac{dy}{dx}=0$

$\frac{5}{3}x+\frac{10}{3}\le\frac{16}{13}x+\frac{20}{13}$

$\left(\frac{6}{7}\right)^{-2}\cdot\left(\frac{4x}{6y}\right)^{-2}$

$\frac{6x^2-31x+35}{2x-7}$

$series\frac{2^{6n}}{6^{2n}}\left(\frac{x}{3}\right)^n$

$x^2+6x-5=0$