$\sqrt[2]{81}\cdot x^8y^4$

$\ln\left(x-4\right)-\ln\left(3x-10\right)+\ln\left(x\right)=0$

$log\left(\sqrt{3x+4}\right)+\frac{1}{2}\left(log\left(5x+1\right)\right)=1+log\left(3\right)$

$\int\:\frac{x^2}{x^3-3}dx$

$\int\frac{\:x+3}{x^2-6x+1}dx$

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

$2\infty2$