$8-3c=8+2c$
$\left(b-4\right)^3$
$x^4-x^3-6x^2$
$x^2+3x+2\ge0$
$8\sin\:x+4\sqrt{2}=0$
$9x^2-18x-16$
$\left(7a^6-9b^4\right)^2$
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