$12-\frac{\left(4\cdot7\right)}{7}$
$10b\:-\:30ab2\:=\:0$
$4y\left(3x+2\right)-2\left(3x+2\right)$
$13-5-9-10+26+120$
$3\left(x^3-729\right)$
$\left(3h^5k^7\right)^3$
$\:2k^2\:+\:5k\:+\:2$
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