$\lim_{x\to-3}\left(\frac{4x^2-12x}{x+3}\right)$

$\lim_{x\to\infty}\left(\frac{\log_{10}\left(\ln\left(x\right)\right)}{\log_{10}\left(\log_{10}\left(x\right)\right)}\right)$

$\int\frac{x^4}{\left(x-2\right)^2\left(x+1\right)^2}dx$

$64\left(5\right)^2-9$

$8^{18}$

$x^2+14x+45=0$

$b+169=421$