$yx^2-60+100$
$f\left(x\right)=\frac{1}{\sqrt{x^2-4x+3}}-2$
$\left(f+100\right)\left(f+20\right)$
$16x^2+40x-25$
$7+\left(a-11\right)$
$18-2x>4$
$\frac{\sqrt{\left(-3\right)^2-6\left(-3\right)+9}}{\left(-3\right)}$
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