$x^2+14x+45=0$
$x^2-7x=5$
$27^x=9^{x-2}$
$\int\frac{1}{z^3}dz$
$-4:-12$
$\frac{1}{2}x^{2}+14x^{5}-1^{2}+3x-6y^{3}\right)$
$4y-2<4y+2$
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