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

$\lim_{n\to\infty}\left(\frac{ln\left(n^2\right)}{xln\left(2n\right)}\right)$

$x\text{4}-16x^2$

$\left(2m+1m\right)^3$

$\left(23mn^7+18x\right)\left(-18x+23n^7\right)$

$y=51.085\ln\left(x\right)-38.155$

$\frac{x+5}{x+2}\cdot\frac{x^2+7x+10}{x-2}$