$100-2x+700$

$4x^2-64$

$\left(ab+8\right)\left(ab-8\right)$

$\left(\frac{7}{5}y\left(3\right)-\frac{2}{3}\right)\left(\frac{4}{7}y\left(3\right)-\frac{7}{3}\right)$

$\int\left(\frac{23x^2}{\sqrt{1-x^2}}\right)dx$

$\frac{1}{\left(1+2n\right)^2}$

$\lim_{x\to\infty}\left(\frac{1}{3}\right)^{x+2}$