$\left(-\frac{2}{a}\right)\left(-8\right)\left(-\frac{2}{5}\right)$

$\lim_{x\to3}-\left(\frac{x^2-9}{x-3}\right)$

$\lim_{x\to0}\left(\frac{\sqrt{x^2+9}-3}{\sqrt{x+16}-\sqrt{3}}\right)$

$\left(10x^2\:-x\:+11\right)^2$

$8t^2+10t+5=0$

$\left(a+b+c\right)^2-\left(a+b\right)^2-c^2$

$\left(yz-yz\right)$