$\left(x^2-\frac{2}{3}x+\frac{2}{3}\right)\left(2x+\frac{2}{3}\right)+\frac{19}{9}x-\frac{11}{18}$

$1024r^2-625t^{10}$

$\int_{\frac{2}{\sqrt{3}}}^2\left(\frac{3}{x^2\sqrt{4+x^2}}\right)dx$

$\lim_{x\to0}\left(\frac{2x^2-3x}{5x^2-3}\right)$

$6+\frac{1}{8\left(x-2\right)^2}$

$5a+a-2a-6b+8a+8b$

$\int x^2\left(x-5\right)^{12}dx$