$8^2\cdot8^5$
$\left(5x+4y\right)\left(2x-1y\right)$
$\frac{12}{4x}\left(\frac{3}{x}\right)$
$\frac{1+\cot\left(z\right)}{1+\tan\left(z\right)}=\cot\left(z\right)$
$57\cdot5^3$
$\frac{1}{3}3+\frac{1}{3}3cosw\:+\frac{2}{9}\:cos2w$
$\left(2x+7\:\right)\left(2x+5\:\right)$
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