$\left(1+3x^2\right)\left(1-3x^2\right)^{\frac{1}{2}}$

$\frac{m-6}{m^2-11m+30}$

$\int ln\left(u\right)du$

$2\left(x+1\right)-3\left(x-2\right)>x+6$

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

$\left(\frac{1}{7}a^5+\frac{b^2}{4}\right)\left(\frac{1}{7}a^5-\frac{b^2}{4}\right)$

$\left(2m-7k\right)\left(2m+7k\right)$