$\frac{x-1}{x-\frac{1}{x}}$

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

$\frac{\tan\left(x\right)+\sec\left(x\right)-\cos\left(x\right)}{\sec\left(x\right)+\tan\left(x\right)}$

$x^4+18x^2+81$

$\frac{x^9}{\left(2x^2+1\right)}$

$\int_0^{10}\left(6t\right)dt$

$\left(10-m\right)^3\:\:\:\:\:\:\:\:\:\:\:\:$