$\left(m+17\right)^2$
$-x^2+9\le\:0$
$\frac{x^4-2x+3}{x-2}$
$49+28a^2+4a^2$
$8a+8b$
$\left(5+b\right)\left(b-5\right)\left(b-3\right)\left(3+b\right)$
$5\cdot0-4$
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