$\log\:_{\frac{1}{3}}\left(\frac{\sqrt{x}}{yz}\right)$

$\frac{2x+3}{x}=\frac{x}{4}$

$\lim_{x\to\infty}\left(\frac{cos\left(20x\right)}{20x}\right)$

$8x^2-12x+1$

$\ln\left(x+4\right)-\ln\left(3\right)=\ln\left(x\right)$

$\lim_{x\to0}\left(\frac{x^2-4}{\sqrt{x-1}-1}\right)$

$\int\left(\frac{x+7}{x^2+2x}\right)\:dx$