$m^6-27n^3$

$\int\:\frac{2x+1}{2x^2-x+6}dx$

$\left(15\right)+\left(82\right)-\left(-75\right)$

$2\left(a-5\right)=4a-\left(2a-10\right)$

$\lim_{x\to0}\left(\frac{2x^3-3x^2-4x}{3-7x-8x^3}\right)$

$\lim_{x\to1}\left(\frac{1}{3-x}-\frac{4x}{\left(3-x\right)\left(3+x\right)}\right)$

$30x^2-47x+7$