$x^2-169=0$

$\lim_{x\to-1}\left(\frac{\left(8x^4+7x^3+6x+5\right)}{x+1}\right)$

$m^2+71mn-14m^2-65mn+m^3-m^2-115m^2+64m^3$

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

$\left(9x-9\right)\left(-5x+7\right)$

$3.02^{2.01}$

$\frac{2}{3}\sqrt[3]{4m^2}.\frac{3}{4}\sqrt[5]{16m^4n}$