$\left(2x^2\right)^2-2\left(2x^2\right)\left(3y^6\right)+\left(3y^6\right)^2$

$\lim_{x\to0}\left(\left(\frac{\sqrt{x+5}-3}{x-4\:}\right)\right)$

$200=x-59$

$x^2+52x+169$

$\lim_{x\to0}\left(\frac{x\cdot\left(x+1\right)}{2x^2}\right)$

$\frac{216x^6-125}{6x^2-5}$

$\left(2ab-3xy^5\right)^2$