$x^3-3x^2y+2xy^2=0$
$9\sin\left(x\right)=2\cos^2\left(x\right)-6$
$7 x - 2 > 3 x - 14$
$\sin2x=2\sin^2x$
$5x-2<10x+8$
$x^2-18x+81=0$
$\frac{x^2+2x-15}{x-1}$
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