$-\left(3x+9\right)^2$
$\frac{2x-2}{x-1}$
$\frac{65.025}{0.005}$
$4+6x^2+3y^2-6y^2+3x^2-2-x^2$
$2x-7<-x+14$
$\cos^2\left(x\right)=1-\frac{\sqrt{2}}{3}$
$\lim_{x\to1}\left(3x^2+2x\right)$
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