$a^2+a+1+9$
$\left(11-ab^3\right)^2$
$\left(5a\:+\:4b\right)\left(5a\:-\:4b\right)$
$\lim_{x\to0}\left(\frac{x-\sin\left(x\right)}{mx^3}\right)$
$8^3\cdot8$
$\frac{x-3}{7}=\frac{4x+12}{7}$
$x^2+9x+2$
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