$\left(-5a-3\right)\left(-4b+2\right)$
$\left(b+c\right)\left(b+c\right)$
$a^2b^2+4a^2b+4a^2$
$y^2-7y+12<0$
$z^2-5z+9$
$3^{5x-1}=27^{4x+2}$
$5+2+3-4+9-9$
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