$${ 2 }^{ 2 } 6x7y9 { z }^{ 2 }$$
$24x_{7}y_{9}z^{2}$
$$4\times 6x_{7}y_{9}z^{2}$$
$$24x_{7}y_{9}z^{2}$$
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$24y_{9}z^{2}$
