$6-5\left(12-22\right)$
$\frac{2+2n}{2n-1}$
$-\left(\left(-2\right)^23\right)^2+2x\left(-5\right)$
$x^2-5^2+x^2+5^2-10x$
$9t^2\:+\:37t\:+4$
$-4h\:=\:-16$
$-2+2s<8$
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