$7x+5x+4x-12;\:x=-12$
$-6y^2-6y^2$
$d^2g^3-d$
$25x^2-30x+4$
$3a^2\left(5a^2+4a-2\right)$
$e^{5\ln\left(4\right)}$
$\left(7x-2\right)\:\left(3x-1\right)$
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