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

$\frac{m\sqrt{m^2-n^2}}{m^2-n^2}$

$\int\frac{240\:}{t^3+2t^2-15t}dt$

$\int_{-2}^2\pi\left(4-x^2\right)^2dx$

$\frac{1}{2\sqrt{x}}\left(5\right)$

$\frac{2x^3-5x^2-1}{x^2-4x+5}$

$\left(10-11\right)-\left[\left(-15\right)+\left(-16\right)-\left(-4\right)\right]$