$\frac{4x^4-2x^3+x-2}{2x^2-x-1}$

$\frac{dy}{dx}\left(2\left(x^2+y^2\right)^2-25\left(x^2-y^2\right)\right)$

$81b^4c^6-49m^6n^2$

$\lim_{x\to\infty}\left(\frac{\log\left(x\right)^{log\left(x\right)+1}}{x}\right)$

$0=\log_{\frac{1}{2}}\left(x+3\right)$

$3+6x-x^2\le m$