$\lim_{x\to\infty}\:e$

$\frac{x^3+8x^2+17x+136}{8x^2+136}$

$\left(2x+4y+8z\right)^2$

$\left(\frac{6a}{n}\right)\left(-\frac{3}{n}\right)$

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

$p^2\left(m-6n\right)+q\left(m-6n\right)$

$\frac{cot^3x\left(cot^2x-csc^2x\right)}{-tan\left(x\right)}$