$\lim_{x\to2}\left(x^3+5x^2-4x+1\right)$

$\frac{d}{dx}\left(\log\left(\frac{9}{2}\right)\right)$

$-30x^2+1400x-1000$

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

$\lim_{x\to0}\left(\frac{1}{x^2}\right)-\cot^2\left(x\right)$

$\frac{2x^2-2x}{7x}$

$\int\frac{2m+1}{\left(3m-1\right)\left(2m+5\right)}dx$