$\lim_{x\to\infty}\left(\frac{2ln\left(x\right)-ln\left(x^2+1\right)}{2}\right)$

$\int\frac{x}{x^2+x-1}dx$

$\frac{dy}{dx}=\frac{2}{7-4y}$

$s=\frac{\left(\left(e^x+e^y\right)^2-\left(e^x-e^y\right)^2\right)}{2e^xe^y}$

$x^2-25>0$

$\left(3-3f\right)^2$

$w=\sqrt{\frac{b}{2}}$