$\lim_{x\to1}\left(\frac{x^3+\:4x^2-11x\:+6}{x-1}\right)$

$\frac{d}{dx}sec4x^5$

$\left(5-3\right)\cdot\left(3+2\right)$

$\left(2.6m^2-3.7n\right)^2$

$\left[2+2cot^2\left(x\right)\right]cos\left(x+\frac{3\pi\:}{2}\right)$

$\frac{m^5}{m}$

$\frac{4}{25}x^2-\frac{4}{5}xy+y^2$