$\left(3b+4\right)\left(2b^2-b+4\right)$
$2g-4\left(g+1\right)+2$
$\left(13m-7n\right)^2$
$-15\:-9\:+\:2\:+\:-\:13$
$x^4+16x^2+16$
$x-4x^2=0$
$-27-11+16+57+15-31$
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