$64y^2\:+\:16y\:+1$
$-3.456\:+\:-987\:$
$\left(9b\left|2y\right|\right)^3$
$7\log x=21$
$-3+7+1-4+5-12+9$
$\sqrt{12}+\sqrt{3}-3\sqrt{3}$
$-2a^2+9-9a+5a^2$
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