$-3\left(x^3-6x^2-x+30\right)$
$\:a^2+b^2-2b^2-3a^2-a^2+b^2$
$\frac{5+3x}{4x+5}>1$
$x\sqrt{x}^2+1$
$x^3+2\ge-6$
$3x+12=-6$
$\sin\:x\cos\:x=-\cos x$
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