$\left(9x-1\right)\left(8x+1\right)$
$\lim_{x\to\infty}\left(1+\frac{3.3}{x}\right)^x$
$3x+6y+9$
$x-y\sqrt{x^3}-y^3$
$n^2+18n$
$\cos\left(nb+o\right)$
$\sqrt{3^2}\:\cdot5^3$
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