$1-25a^2b^2$
$6x+3<57$
$x^2-24x-10$
$x\left(3-2b\right)-1=x\left(2-3b\right)-b$
$5x^2+3x-2x$
$\frac{9}{-3}$
$\left(-1+x^7\right)\left(1+x^7\right)$
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