$-8r+8r>8$
$2\cos\left(x-60\right)=\sqrt{3}$
$\left(140-3x\right)^2$
$\lim_{x\to-0.9}\frac{1-\cos\left(-0.9\right)}{-0.9}$
$\frac{1}{\sqrt{x}+a}$
$50x^2-80x+32$
$n-194<-66$
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