$2x+1=x+2$
$2x^2-3x-1$
$1.7^2$
$\left(2x-3\right)^2-3\left(x+4\right)\left(x-4\right)+2\left(x-4\right)+1$
$\left(2m+2\right)\left(m+2\right)$
$a^2b-ab^2+ab-4ab^2-4ab^2-ba^2$
$\left(x-12\right)\left(x-17\right)$
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